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| # | ID | Title | Solved by | Difficulty |
| 1 | 100 | The 3n + 1 problem | 26485 | 1 |
| 2 | 102 | Ecological Bin Packing | 10608 | 2 |
| 3 | 10071 | Back to High School Physics | 9554 | 3 |
| 4 | 10055 | Hashmat the Brave Warrior | 9432 | 3 |
| 5 | 272 | TEX Quotes | 8192 | 3 |
| 6 | 458 | The Decoder | 7289 | 4 |
| 7 | 136 | Ugly Numbers | 6729 | 4 |
| 8 | 10038 | Jolly Jumpers | 6319 | 4 |
| 9 | 10035 | Primary Arithmetic | 6268 | 4 |
| 10 | 10018 | Reverse and Add | 6061 | 4 |
| 11 | 108 | Maximum Sum | 6022 | 4 |
| 12 | 113 | Power of Cryptography | 5804 | 5 |
| 13 | 494 | Kindergarten Counting Game | 5784 | 5 |
| 14 | 299 | Train Swapping | 5752 | 5 |
| 15 | 10082 | WERTYU | 5481 | 5 |
| 16 | 101 | The Blocks Problem | 5225 | 5 |
| 17 | 591 | Box of Bricks | 5113 | 5 |
| 18 | 10008 | What's Cryptanalysis? | 4942 | 5 |
| 19 | 10300 | Ecological Premium | 4839 | 5 |
| 20 | 575 | Skew Binary | 4732 | 6 |
| 21 | 369 | Combinations | 4543 | 6 |
| 22 | 151 | Power Crisis | 4470 | 6 |
| 23 | 382 | Perfection | 4393 | 6 |
| 24 | 10370 | Above Average | 4377 | 6 |
| 25 | 160 | Factors and Factorials | 4314 | 6 |
| 26 | 10189 | Minesweeper | 4303 | 6 |
| 27 | 579 | ClockHands | 4293 | 6 |
| 28 | 264 | Count on Cantor | 4237 | 6 |
| 29 | 424 | Integer Inquiry | 4214 | 6 |
| 30 | 499 | What's The Frequency, Kenneth? | 4194 | 6 |
| 31 | 10110 | Light, More Light | 4189 | 6 |
| 32 | 541 | Error Correction | 4096 | 6 |
| 33 | 543 | Goldbach's Conjecture | 4021 | 7 |
| 34 | 10004 | Bicoloring | 3939 | 7 |
| 35 | 10107 | What is the Median? | 3891 | 7 |
| 36 | 374 | Big Mod | 3876 | 7 |
| 37 | 686 | Goldbach's Conjecture (II) | 3852 | 7 |
| 38 | 105 | The Skyline Problem | 3839 | 7 |
| 39 | 495 | Fibonacci Freeze | 3827 | 7 |
| 40 | 483 | Word Scramble | 3793 | 7 |
| 41 | 10041 | Vito's Family | 3785 | 7 |
| 42 | 10019 | Funny Encryption Method | 3773 | 7 |
| 43 | 256 | Quirksome Squares | 3713 | 7 |
| 44 | 138 | Street Numbers | 3661 | 7 |
| 45 | 10079 | Pizza Cutting | 3627 | 7 |
| 46 | 530 | Binomial Showdown | 3609 | 7 |
| 47 | 10696 | f91 | 3552 | 7 |
| 48 | 111 | History Grading | 3533 | 7 |
| 49 | 10340 | All in All | 3501 | 8 |
| 50 | 10783 | Odd Sum | 3500 | 8 |
| 51 | 476 | Points in Figures: Rectangles | 3481 | 8 |
| 52 | 344 | Roman Digititis | 3443 | 8 |
| 53 | 673 | Parentheses Balance | 3436 | 8 |
| 54 | 10346 | Peter's Smoke | 3367 | 8 |
| 55 | 120 | Stacks of Flapjacks | 3359 | 8 |
| 56 | 10469 | To Carry or not to Carry | 3338 | 8 |
| 57 | 10127 | Ones | 3329 | 8 |
| 58 | 492 | Pig-Latin | 3265 | 8 |
| 59 | 438 | The Circumference of the Circle | 3252 | 8 |
| 60 | 10327 | Flip Sort | 3214 | 8 |
| 61 | 401 | Palindromes | 3212 | 8 |
| 62 | 10050 | Hartals | 3211 | 8 |
| 63 | 103 | Stacking Boxes | 3207 | 8 |
| 64 | 324 | Factorial Frequencies | 3191 | 8 |
| 65 | 146 | ID Codes | 3138 | 8 |
| 66 | 350 | Pseudo-Random Numbers | 3115 | 9 |
| 67 | 10106 | Product | 3083 | 9 |
| 68 | 10222 | Decode the Mad man | 3037 | 9 |
| 69 | 10006 | Carmichael Numbers | 3036 | 9 |
| 70 | 568 | Just the Facts | 3033 | 9 |
| 71 | 440 | Eeny Meeny Moo | 3023 | 9 |
| 72 | 305 | Joseph | 2986 | 9 |
| 73 | 10405 | Longest Common Subsequence | 2954 | 9 |
| 74 | 583 | Prime Factors | 2952 | 9 |
| 75 | 484 | The Department of Redundancy Department | 2947 | 9 |
| 76 | 10302 | Summation of Polynomials | 2934 | 9 |
| 77 | 477 | Points in Figures: Rectangles and Circles | 2933 | 9 |
| 78 | 412 | Pi | 2898 | 9 |
| 79 | 446 | Kibbles ``n'' Bits ``n'' Bits ``n'' Bits | 2890 | 9 |
| 80 | 406 | Prime Cuts | 2885 | 9 |
| 81 | 10260 | Soundex | 2848 | 9 |
| 82 | 640 | Self Numbers | 2846 | 9 |
| 83 | 572 | Oil Deposits | 2835 | 9 |
| 84 | 294 | Divisors | 2832 | 9 |
| 85 | 118 | Mutant Flatworld Explorers | 2816 | 9 |
| 86 | 107 | The Cat in the Hat | 2791 | 9 |
| 87 | 445 | Marvelous Mazes | 2775 | 10 |
| 88 | 112 | Tree Summing | 2755 | 10 |
| 89 | 694 | The Collatz Sequence | 2741 | 10 |
| 90 | 706 | LCD Display | 2736 | 10 |
| 91 | 10013 | Super long sums | 2702 | 10 |
| 92 | 439 | Knight Moves | 2699 | 10 |
| 93 | 443 | Humble Numbers | 2680 | 10 |
| 94 | 674 | Coin Change | 2644 | 10 |
| 95 | 10812 | Beat the Spread! | 2596 | 10 |
| 96 | 371 | Ackermann Functions | 2573 | 10 |
| 97 | 834 | Continued Fractions | 2565 | 10 |
| 98 | 119 | Greedy Gift Givers | 2552 | 10 |
| 99 | 10220 | I Love Big Numbers ! | 2532 | 10 |
| 100 | 386 | Perfect Cubes | 2529 | 10 |
| 101 | 167 | The Sultan's Successors | 2484 | 11 |
| 102 | 444 | Encoder and Decoder | 2477 | 11 |
| 103 | 713 | Adding Reversed Numbers | 2471 | 11 |
| 104 | 195 | Anagram | 2464 | 11 |
| 105 | 392 | Polynomial Showdown | 2458 | 11 |
| 106 | 10424 | Love Calculator | 2453 | 11 |
| 107 | 190 | Circle Through Three Points | 2430 | 11 |
| 108 | 291 | The House Of Santa Claus | 2425 | 11 |
| 109 | 10161 | Ant on a Chessboard | 2410 | 11 |
| 110 | 489 | Hangman Judge | 2373 | 11 |
| 111 | 128 | Software CRC | 2359 | 11 |
| 112 | 133 | The Dole Queue | 2334 | 11 |
| 113 | 490 | Rotating Sentences | 2323 | 11 |
| 114 | 10003 | Cutting Sticks | 2312 | 11 |
| 115 | 573 | The Snail | 2277 | 12 |
| 116 | 10098 | Generating Fast, Sorted Permutation | 2266 | 12 |
| 117 | 488 | Triangle Wave | 2252 | 12 |
| 118 | 408 | Uniform Generator | 2243 | 12 |
| 119 | 10324 | Zeros and Ones | 2225 | 12 |
| 120 | 10235 | Simply Emirp | 2220 | 12 |
| 121 | 441 | Lotto | 2200 | 12 |
| 122 | 106 | Fermat vs. Pythagoras | 2196 | 12 |
| 123 | 414 | Machined Surfaces | 2181 | 12 |
| 124 | 623 | 500! | 2174 | 12 |
| 125 | 10323 | Factorial! You Must be Kidding!!! | 2141 | 12 |
| 126 | 576 | Haiku Review | 2138 | 12 |
| 127 | 200 | Rare Order | 2119 | 12 |
| 128 | 10209 | Is This Integration ? | 2118 | 13 |
| 129 | 10252 | Common Permutation | 2114 | 13 |
| 130 | 10432 | Polygon Inside A Circle | 2108 | 13 |
| 131 | 10062 | Tell me the frequencies! | 2101 | 13 |
| 132 | 116 | Unidirectional TSP | 2076 | 13 |
| 133 | 536 | Tree Recovery | 2046 | 13 |
| 134 | 10473 | Simple Base Conversion | 2034 | 13 |
| 135 | 10131 | Is Bigger Smarter? | 2017 | 13 |
| 136 | 847 | A Multiplication Game | 2012 | 13 |
| 137 | 10699 | Count the factors | 2010 | 13 |
| 138 | 104 | Arbitrage | 2005 | 13 |
| 139 | 10924 | Prime Words | 2004 | 13 |
| 140 | 417 | Word Index | 1992 | 13 |
| 141 | 156 | Ananagrams | 1986 | 13 |
| 142 | 496 | Simply Subsets | 1982 | 13 |
| 143 | 10409 | Die Game | 1982 | 13 |
| 144 | 478 | Points in Figures: Rectangles, Circles, Triangles | 1973 | 13 |
| 145 | 10530 | Guessing Game | 1966 | 13 |
| 146 | 10929 | You can say 11 | 1963 | 13 |
| 147 | 621 | Secret Research | 1960 | 14 |
| 148 | 10195 | The Knights Of The Round Table | 1960 | 14 |
| 149 | 10338 | Mischievous Children | 1954 | 14 |
| 150 | 10066 | The Twin Towers | 1935 | 14 |
| 151 | 130 | Roman Roulette | 1933 | 14 |
| 152 | 352 | The Seasonal War | 1929 | 14 |
| 153 | 10921 | Find the Telephone | 1921 | 14 |
| 154 | 400 | Unix ls | 1914 | 14 |
| 155 | 10579 | Fibonacci Numbers | 1849 | 14 |
| 156 | 10192 | Vacation | 1843 | 14 |
| 157 | 10515 | Powers Et Al. | 1829 | 14 |
| 158 | 117 | The Postal Worker Rings Once | 1827 | 14 |
| 159 | 10000 | Longest Paths | 1822 | 15 |
| 160 | 147 | Dollars | 1805 | 15 |
| 161 | 846 | Steps | 1804 | 15 |
| 162 | 10550 | Combination Lock | 1803 | 15 |
| 163 | 155 | All Squares | 1797 | 15 |
| 164 | 191 | Intersection | 1796 | 15 |
| 165 | 10104 | Euclid Problem | 1796 | 15 |
| 166 | 10499 | The Land of Justice | 1762 | 15 |
| 167 | 10591 | Happy Number | 1744 | 15 |
| 168 | 10137 | The Trip | 1733 | 15 |
| 169 | 122 | Trees on the level | 1729 | 15 |
| 170 | 121 | Pipe Fitters | 1714 | 15 |
| 171 | 10310 | Dog and Gopher | 1714 | 15 |
| 172 | 10193 | All You Need Is Love | 1691 | 16 |
| 173 | 10305 | Ordering Tasks | 1689 | 16 |
| 174 | 10034 | Freckles | 1679 | 16 |
| 175 | 357 | Let Me Count The Ways | 1653 | 16 |
| 176 | 389 | Basically Speaking | 1652 | 16 |
| 177 | 10334 | Ray Through Glasses | 1637 | 16 |
| 178 | 10931 | Parity | 1634 | 16 |
| 179 | 10010 | Where's Waldorf? | 1615 | 16 |
| 180 | 271 | Simply Syntax | 1604 | 17 |
| 181 | 10099 | The Tourist Guide | 1604 | 17 |
| 182 | 300 | Maya Calendar | 1601 | 17 |
| 183 | 10450 | World Cup Noise | 1591 | 17 |
| 184 | 532 | Dungeon Master | 1590 | 17 |
| 185 | 562 | Dividing coins | 1585 | 17 |
| 186 | 514 | Rails | 1571 | 17 |
| 187 | 498 | Polly the Polynomial | 1569 | 17 |
| 188 | 612 | DNA Sorting | 1561 | 17 |
| 189 | 10105 | Polynomial Coefficients | 1560 | 17 |
| 190 | 534 | Frogger | 1555 | 17 |
| 191 | 10282 | Babelfish | 1555 | 17 |
| 192 | 594 | One Little, Two Little, Three Little Endians | 1549 | 17 |
| 193 | 348 | Optimal Array Multiplication Sequence | 1546 | 17 |
| 194 | 442 | Matrix Chain Multiplication | 1539 | 17 |
| 195 | 336 | A Node Too Far | 1532 | 17 |
| 196 | 10015 | Joseph's Cousin | 1521 | 17 |
| 197 | 10789 | Prime Frequency | 1507 | 18 |
| 198 | 10033 | Interpreter | 1505 | 18 |
| 199 | 10168 | Summation of Four Primes | 1499 | 18 |
| 200 | 340 | Master-Mind Hints | 1496 | 18 |
| 201 | 144 | Student Grants | 1482 | 18 |
| 202 | 10042 | Smith Numbers | 1477 | 18 |
| 203 | 154 | Recycling | 1460 | 18 |
| 204 | 10533 | Digit Primes | 1456 | 18 |
| 205 | 10420 | List of Conquests | 1455 | 18 |
| 206 | 109 | SCUD Busters | 1446 | 18 |
| 207 | 740 | Baudot Data Communication Code | 1431 | 19 |
| 208 | 10361 | Automatic Poetry | 1418 | 19 |
| 209 | 10394 | Twin Primes | 1417 | 19 |
| 210 | 216 | Getting in Line | 1413 | 19 |
| 211 | 544 | Heavy Cargo | 1406 | 19 |
| 212 | 10183 | How Many Fibs? | 1396 | 19 |
| 213 | 378 | Intersecting Lines | 1395 | 19 |
| 214 | 10286 | Trouble with a Pentagon | 1393 | 19 |
| 215 | 624 | CD | 1383 | 19 |
| 216 | 10074 | Take the Land | 1382 | 19 |
| 217 | 11000 | Bee | 1381 | 19 |
| 218 | 661 | Blowing Fuses | 1374 | 19 |
| 219 | 10922 | 2 the 9s | 1374 | 19 |
| 220 | 10116 | Robot Motion | 1371 | 19 |
| 221 | 10608 | Friends | 1369 | 19 |
| 222 | 278 | Chess | 1367 | 19 |
| 223 | 10295 | Hay Points | 1365 | 19 |
| 224 | 10336 | Rank the Languages | 1359 | 19 |
| 225 | 537 | Artificial Intelligence? | 1353 | 20 |
| 226 | 10221 | Satellites | 1351 | 20 |
| 227 | 642 | Word Amalgamation | 1349 | 20 |
| 228 | 10191 | Longest Nap | 1339 | 20 |
| 229 | 11172 | Relational Operator | 1334 | 20 |
| 230 | 10276 | Hanoi Tower Troubles Again! | 1323 | 20 |
| 231 | 587 | There's treasure everywhere! | 1321 | 20 |
| 232 | 10970 | Big Chocolate | 1320 | 20 |
| 233 | 524 | Prime Ring Problem | 1316 | 20 |
| 234 | 10219 | Find the ways ! | 1316 | 20 |
| 235 | 343 | What Base Is This? | 1311 | 20 |
| 236 | 516 | Prime Land | 1311 | 20 |
| 237 | 10152 | ShellSort | 1300 | 20 |
| 238 | 315 | Network | 1294 | 20 |
| 239 | 574 | Sum It Up | 1292 | 20 |
| 240 | 567 | Risk | 1289 | 21 |
| 241 | 474 | Heads / Tails Probability | 1287 | 21 |
| 242 | 355 | The Bases Are Loaded | 1285 | 21 |
| 243 | 10049 | Self-describing Sequence | 1273 | 21 |
| 244 | 10070 | Leap Year or Not Leap Year and ... | 1272 | 21 |
| 245 | 10182 | Bee Maja | 1267 | 21 |
| 246 | 10223 | How many nodes ? | 1262 | 21 |
| 247 | 636 | Squares (III) | 1250 | 21 |
| 248 | 202 | Repeating Decimals | 1247 | 21 |
| 249 | 10130 | SuperSale | 1245 | 21 |
| 250 | 10196 | Check The Check | 1243 | 21 |
| 251 | 10190 | Divide, But Not Quite Conquer! | 1241 | 21 |
| 252 | 10198 | Counting | 1241 | 21 |
| 253 | 123 | Searching Quickly | 1239 | 21 |
| 254 | 729 | The Hamming Distance Problem | 1207 | 22 |
| 255 | 10297 | Beavergnaw | 1206 | 22 |
| 256 | 10700 | Camel trading | 1195 | 22 |
| 257 | 320 | Border | 1189 | 22 |
| 258 | 465 | Overflow | 1187 | 22 |
| 259 | 497 | Strategic Defense Initiative | 1187 | 22 |
| 260 | 153 | Permalex | 1186 | 22 |
| 261 | 739 | Soundex Indexing | 1181 | 22 |
| 262 | 637 | Booklet Printing | 1177 | 23 |
| 263 | 10067 | Playing with Wheels | 1177 | 23 |
| 264 | 124 | Following Orders | 1169 | 23 |
| 265 | 409 | Excuses, Excuses! | 1169 | 23 |
| 266 | 423 | MPI Maelstrom | 1163 | 23 |
| 267 | 422 | Word-Search Wonder | 1156 | 23 |
| 268 | 459 | Graph Connectivity | 1153 | 23 |
| 269 | 486 | English-Number Translator | 1149 | 23 |
| 270 | 10026 | Shoemaker's Problem | 1146 | 23 |
| 271 | 10611 | The Playboy Chimp | 1140 | 23 |
| 272 | 253 | Cube painting | 1139 | 23 |
| 273 | 10474 | Where is the Marble? | 1135 | 23 |
| 274 | 10701 | Pre, in and post | 1132 | 23 |
| 275 | 10048 | Audiophobia | 1128 | 23 |
| 276 | 482 | Permutation Arrays | 1127 | 24 |
| 277 | 555 | Bridge Hands | 1121 | 24 |
| 278 | 10509 | R U Kidding Mr. Feynman! | 1120 | 24 |
| 279 | 10077 | The Stern-Brocot Number System | 1118 | 24 |
| 280 | 311 | Packets | 1113 | 24 |
| 281 | 10784 | Diagonal | 1113 | 24 |
| 282 | 10258 | Contest Scoreboard | 1111 | 24 |
| 283 | 485 | Pascal's Triangle of Death | 1109 | 24 |
| 284 | 748 | Exponentiation | 1105 | 24 |
| 285 | 413 | Up and Down Sequences | 1103 | 24 |
| 286 | 531 | Compromise | 1102 | 24 |
| 287 | 558 | Wormholes | 1102 | 24 |
| 288 | 10573 | Geometry Paradox | 1102 | 24 |
| 289 | 10945 | Mother bear | 1102 | 24 |
| 290 | 145 | Gondwanaland Telecom | 1094 | 24 |
| 291 | 10407 | Simple division | 1094 | 24 |
| 292 | 10170 | The Hotel with Infinite Rooms | 1086 | 24 |
| 293 | 114 | Simulation Wizardry | 1080 | 25 |
| 294 | 10025 | The ? 1 ? 2 ? ... ? n = k problem | 1078 | 25 |
| 295 | 10242 | Fourth Point !! | 1078 | 25 |
| 296 | 201 | Squares | 1077 | 25 |
| 297 | 10465 | Homer Simpson | 1076 | 25 |
| 298 | 297 | Quadtrees | 1073 | 25 |
| 299 | 326 | Extrapolation Using a Difference Table | 1073 | 25 |
| 300 | 10102 | The path in the colored field | 1071 | 25 |
| 301 | 170 | Clock Patience | 1063 | 25 |
| 302 | 10179 | Irreducable Basic Fractions | 1062 | 25 |
| 303 | 10162 | Last Digit | 1061 | 25 |
| 304 | 161 | Traffic Lights | 1058 | 25 |
| 305 | 140 | Bandwidth | 1053 | 25 |
| 306 | 10036 | Divisibility | 1052 | 25 |
| 307 | 10487 | Closest Sums | 1049 | 25 |
| 308 | 356 | Square Pegs And Round Holes | 1045 | 25 |
| 309 | 231 | Testing the CATCHER | 1037 | 26 |
| 310 | 10622 | Perfect P-th Powers | 1034 | 26 |
| 311 | 10678 | The Grazing Cow | 1028 | 26 |
| 312 | 784 | Maze Exploration | 1027 | 26 |
| 313 | 10009 | All Roads Lead Where? | 1023 | 26 |
| 314 | 10285 | Longest Run on a Snowboard | 1015 | 26 |
| 315 | 10056 | What is the Probability ? | 1010 | 26 |
| 316 | 10139 | Factovisors | 1010 | 26 |
| 317 | 10347 | Medians | 1009 | 26 |
| 318 | 10489 | Boxes of Chocolates | 1009 | 26 |
| 319 | 639 | Don't Get Rooked | 1007 | 26 |
| 320 | 615 | Is It A Tree? | 1006 | 26 |
| 321 | 836 | Largest Submatrix | 1006 | 26 |
| 322 | 10642 | Can You Solve It? | 1003 | 26 |
| 323 | 539 | The Settlers of Catan | 1001 | 26 |
| 324 | 701 | The Archeologists' Dilemma | 1001 | 26 |
| 325 | 10684 | The jackpot | 1001 | 26 |
| 326 | 10451 | Ancient Village Sports | 994 | 27 |
| 327 | 115 | Climbing Trees | 993 | 27 |
| 328 | 10703 | Free spots | 993 | 27 |
| 329 | 10427 | Naughty Sleepy Boys | 984 | 27 |
| 330 | 10633 | Rare Easy Problem | 981 | 27 |
| 331 | 325 | Identifying Legal Pascal Real Constants | 977 | 27 |
| 332 | 166 | Making Change | 973 | 27 |
| 333 | 455 | Periodic Strings | 973 | 27 |
| 334 | 152 | Tree's a Crowd | 971 | 27 |
| 335 | 275 | Expanding Fractions | 970 | 27 |
| 336 | 507 | Jill Rides Again | 968 | 27 |
| 337 | 10408 | Farey sequences | 967 | 27 |
| 338 | 10502 | Counting Rectangles | 967 | 27 |
| 339 | 10014 | Simple calculations | 964 | 27 |
| 340 | 384 | Slurpys | 962 | 28 |
| 341 | 10093 | An Easy Problem! | 961 | 28 |
| 342 | 125 | Numbering Paths | 958 | 28 |
| 343 | 141 | The Spot Game | 958 | 28 |
| 344 | 10125 | Sumsets | 958 | 28 |
| 345 | 10229 | Modular Fibonacci | 957 | 28 |
| 346 | 437 | The Tower of Babylon | 953 | 28 |
| 347 | 333 | Recognizing Good ISBNs | 952 | 28 |
| 348 | 10878 | Decode the tape | 949 | 28 |
| 349 | 10815 | Andy's First Dictionary | 944 | 28 |
| 350 | 10188 | Automated Judge Script | 940 | 28 |
| 351 | 10267 | Graphical Editor | 940 | 28 |
| 352 | 608 | Counterfeit Dollar | 934 | 28 |
| 353 | 110 | Meta-Loopless Sorts | 928 | 29 |
| 354 | 193 | Graph Coloring | 924 | 29 |
| 355 | 10299 | Relatives | 919 | 29 |
| 356 | 628 | Passwords | 916 | 29 |
| 357 | 10491 | Cows and Cars | 916 | 29 |
| 358 | 10365 | Blocks | 914 | 29 |
| 359 | 10080 | Gopher II | 913 | 29 |
| 360 | 580 | Critical Mass | 910 | 29 |
| 361 | 337 | Interpreting Control Sequences | 907 | 29 |
| 362 | 10020 | Minimal coverage | 902 | 29 |
| 363 | 164 | String Computer | 900 | 29 |
| 364 | 10714 | Ants | 900 | 29 |
| 365 | 377 | Cowculations | 899 | 29 |
| 366 | 10583 | Ubiquitous Religions | 899 | 29 |
| 367 | 700 | Date Bugs | 898 | 29 |
| 368 | 10176 | Ocean Deep ! - Make it shallow !! | 896 | 30 |
| 369 | 450 | Little Black Book | 890 | 30 |
| 370 | 436 | Arbitrage (II) | 885 | 30 |
| 371 | 10490 | Mr. Azad and his Son!!!!! | 884 | 30 |
| 372 | 10281 | Average Speed | 882 | 30 |
| 373 | 280 | Vertex | 879 | 30 |
| 374 | 10007 | Count the Trees | 877 | 30 |
| 375 | 10140 | Prime Distance | 873 | 30 |
| 376 | 725 | Division | 871 | 30 |
| 377 | 793 | Network Connections | 871 | 30 |
| 378 | 10298 | Power Strings | 869 | 30 |
| 379 | 10452 | Marcus, help! | 866 | 31 |
| 380 | 10404 | Bachet's Game | 861 | 31 |
| 381 | 10100 | Longest Match | 859 | 31 |
| 382 | 11185 | Ternary | 859 | 31 |
| 383 | 619 | Numerically Speaking | 854 | 31 |
| 384 | 10205 | Stack 'em Up | 853 | 31 |
| 385 | 644 | Immediate Decodability | 849 | 31 |
| 386 | 10508 | Word Morphing | 849 | 31 |
| 387 | 542 | France '98 | 848 | 31 |
| 388 | 10673 | Play with Floor and Ceil | 848 | 31 |
| 389 | 127 | ``Accordian'' Patience | 844 | 31 |
| 390 | 571 | Jugs | 844 | 31 |
| 391 | 332 | Rational Numbers from Repeating Fractions | 841 | 31 |
| 392 | 10359 | Tiling | 839 | 32 |
| 393 | 10078 | The Art Gallery | 838 | 32 |
| 394 | 10539 | Almost Prime Numbers | 832 | 32 |
| 395 | 696 | How Many Knights | 831 | 32 |
| 396 | 10002 | Center of Masses | 830 | 32 |
| 397 | 10948 | The primary problem | 830 | 32 |
| 398 | 263 | Number Chains | 824 | 32 |
| 399 | 353 | Pesky Palindromes | 821 | 32 |
| 400 | 712 | S-Trees | 819 | 32 |
| 401 | 10656 | Maximum Sum (II) | 812 | 33 |
| 402 | 10400 | Game Show Math | 810 | 33 |
| 403 | 466 | Mirror, Mirror | 807 | 33 |
| 404 | 10115 | Automatic Editing | 805 | 33 |
| 405 | 727 | Equation | 803 | 33 |
| 406 | 129 | Krypton Factor | 799 | 33 |
| 407 | 448 | OOPS! | 797 | 33 |
| 408 | 10664 | Luggage | 796 | 33 |
| 409 | 232 | Crossword Answers | 794 | 33 |
| 410 | 131 | The Psychic Poker Player | 793 | 33 |
| 411 | 10129 | Play on Words | 784 | 34 |
| 412 | 10194 | Football (aka Soccer) | 784 | 34 |
| 413 | 10081 | Tight Words | 783 | 34 |
| 414 | 10142 | Australian Voting | 780 | 34 |
| 415 | 10363 | Tic Tac Toe | 780 | 34 |
| 416 | 10303 | How Many Trees? | 774 | 34 |
| 417 | 10397 | Connect the Campus | 773 | 34 |
| 418 | 10935 | Throwing cards away I | 773 | 34 |
| 419 | 895 | Word Problem | 772 | 34 |
| 420 | 10293 | Word Length and Frequency | 767 | 35 |
| 421 | 10301 | Rings and Glue | 764 | 35 |
| 422 | 679 | Dropping Balls | 762 | 35 |
| 423 | 641 | Do the Untwist | 760 | 35 |
| 424 | 620 | Cellular Structure | 755 | 35 |
| 425 | 10311 | Goldbach and Euler | 755 | 35 |
| 426 | 383 | Shipping Routes | 751 | 35 |
| 427 | 10790 | How Many Points of Intersection? | 751 | 35 |
| 428 | 10954 | Add All | 746 | 36 |
| 429 | 126 | The Errant Physicist | 743 | 36 |
| 430 | 10800 | Not That Kind of Graph | 743 | 36 |
| 431 | 260 | Il Gioco dell'X | 741 | 36 |
| 432 | 10415 | Eb Alto Saxophone Player | 740 | 36 |
| 433 | 227 | Puzzle | 739 | 36 |
| 434 | 10443 | Rock, Scissors, Paper | 739 | 36 |
| 435 | 755 | 487--3279 | 738 | 36 |
| 436 | 913 | Joana and the Odd Numbers | 737 | 36 |
| 437 | 602 | What Day Is It? | 734 | 36 |
| 438 | 10940 | Throwing cards away II | 734 | 36 |
| 439 | 681 | Convex Hull Finding | 730 | 36 |
| 440 | 301 | Transportation | 729 | 36 |
| 441 | 306 | Cipher | 725 | 37 |
| 442 | 10112 | Myacm Triangles | 719 | 37 |
| 443 | 10341 | Solve It | 717 | 37 |
| 444 | 10494 | If We Were a Child Again | 717 | 37 |
| 445 | 585 | Triangles | 716 | 37 |
| 446 | 750 | 8 Queens Chess Problem | 713 | 37 |
| 447 | 11044 | Searching for Nessy | 713 | 37 |
| 448 | 850 | Crypt Kicker II | 711 | 37 |
| 449 | 10315 | Poker Hands | 705 | 38 |
| 450 | 10852 | Less Prime | 705 | 38 |
| 451 | 10279 | Mine Sweeper | 704 | 38 |
| 452 | 394 | Mapmaker | 702 | 38 |
| 453 | 10496 | Collecting Beepers | 700 | 38 |
| 454 | 10903 | Rock-Paper-Scissors Tournament | 700 | 38 |
| 455 | 10283 | The Kissing Circles | 694 | 38 |
| 456 | 900 | Brick Wall Patterns | 691 | 38 |
| 457 | 460 | Overlapping Rectangles | 690 | 38 |
| 458 | 699 | The Falling Leaves | 687 | 39 |
| 459 | 402 | M*A*S*H | 685 | 39 |
| 460 | 10037 | Bridge | 684 | 39 |
| 461 | 10128 | Queue | 684 | 39 |
| 462 | 10101 | Bangla Numbers | 681 | 39 |
| 463 | 10693 | Traffic Volume | 679 | 39 |
| 464 | 825 | Walking on the Safe Side | 677 | 39 |
| 465 | 10057 | A mid-summer night's dream. | 675 | 39 |
| 466 | 10063 | Knuth's Permutation | 672 | 39 |
| 467 | 11059 | Maximum Product | 672 | 39 |
| 468 | 10069 | Distinct Subsequences | 670 | 40 |
| 469 | 213 | Message Decoding | 669 | 40 |
| 470 | 481 | What Goes Up | 666 | 40 |
| 471 | 785 | Grid Colouring | 665 | 40 |
| 472 | 10344 | 23 out of 5 | 664 | 40 |
| 473 | 10377 | Maze Traversal | 659 | 40 |
| 474 | 10551 | Basic Remains | 658 | 40 |
| 475 | 11192 | Group Reverse | 655 | 40 |
| 476 | 10245 | The Closest Pair Problem | 654 | 40 |
| 477 | 10706 | Number Sequence | 654 | 40 |
| 478 | 762 | We Ship Cheap | 651 | 41 |
| 479 | 10141 | Request for Proposal | 650 | 41 |
| 480 | 10600 | ACM Contest and Blackout | 647 | 41 |
| 481 | 159 | Word Crosses | 643 | 41 |
| 482 | 10810 | Ultra-QuickSort | 642 | 41 |
| 483 | 187 | Transaction Processing | 640 | 41 |
| 484 | 397 | Equation Elation | 640 | 41 |
| 485 | 808 | Bee Breeding | 640 | 41 |
| 486 | 861 | Little Bishops | 640 | 41 |
| 487 | 188 | Perfect Hash | 639 | 41 |
| 488 | 331 | Mapping the Swaps | 639 | 41 |
| 489 | 821 | Page Hopping | 635 | 42 |
| 490 | 10392 | Factoring Large Numbers | 633 | 42 |
| 491 | 469 | Wetlands of Florida | 632 | 42 |
| 492 | 839 | Not so Mobile | 631 | 42 |
| 493 | 820 | Internet Bandwidth | 630 | 42 |
| 494 | 11057 | Exact Sum | 629 | 42 |
| 495 | 10054 | The Necklace | 625 | 42 |
| 496 | 884 | Factorial Factors | 618 | 43 |
| 497 | 10375 | Choose and divide | 618 | 43 |
| 498 | 10976 | Fractions Again?! | 615 | 43 |
| 499 | 10523 | Very Easy !!! | 613 | 43 |
| 500 | 10589 | Area | 612 | 43 |
| 501 | 218 | Moth Eradication | 611 | 43 |
| 502 | 10519 | !! Really Strange !! | 608 | 44 |
| 503 | 10368 | Euclid's Game | 604 | 44 |
| 504 | 10918 | Tri Tiling | 602 | 44 |
| 505 | 10919 | Prerequisites? | 601 | 44 |
| 506 | 134 | Loglan-A Logical Language | 597 | 44 |
| 507 | 142 | Mouse Clicks | 596 | 44 |
| 508 | 391 | Mark-up | 594 | 45 |
| 509 | 10719 | Quotient Polynomial | 594 | 45 |
| 510 | 10177 | (2/3/4)-D Sqr/Rects/Cubes/Boxes? | 593 | 45 |
| 511 | 10730 | Antiarithmetic? | 592 | 45 |
| 512 | 254 | Towers of Hanoi | 587 | 45 |
| 513 | 10534 | Wavio Sequence | 585 | 45 |
| 514 | 148 | Anagram checker | 584 | 45 |
| 515 | 651 | Deck | 584 | 45 |
| 516 | 626 | Ecosystem | 583 | 45 |
| 517 | 10683 | The decadary watch | 582 | 46 |
| 518 | 435 | Block Voting | 581 | 46 |
| 519 | 10943 | How do you add? | 581 | 46 |
| 520 | 11121 | Base -2 | 581 | 46 |
| 521 | 630 | Anagrams (II) | 580 | 46 |
| 522 | 634 | Polygon | 579 | 46 |
| 523 | 10500 | Robot maps | 579 | 46 |
| 524 | 737 | Gleaming the Cubes | 577 | 46 |
| 525 | 10360 | Rat Attack | 576 | 46 |
| 526 | 10287 | Gifts in a Hexagonal Box | 575 | 46 |
| 527 | 711 | Dividing up | 573 | 46 |
| 528 | 183 | Bit Maps | 571 | 46 |
| 529 | 362 | 18,000 Seconds Remaining | 570 | 46 |
| 530 | 10051 | Tower of Cubes | 570 | 46 |
| 531 | 132 | Bumpy Objects | 569 | 47 |
| 532 | 10165 | Stone Game | 568 | 47 |
| 533 | 10213 | How Many Pieces of Land ? | 564 | 47 |
| 534 | 10369 | Arctic Network | 564 | 47 |
| 535 | 10916 | Factstone Benchmark | 564 | 47 |
| 536 | 10905 | Children's Game | 562 | 47 |
| 537 | 416 | LED Test | 561 | 47 |
| 538 | 10012 | How Big Is It? | 561 | 47 |
| 539 | 10879 | Code Refactoring | 560 | 47 |
| 540 | 540 | Team Queue | 559 | 47 |
| 541 | 10566 | Crossed Ladders | 558 | 47 |
| 542 | 10702 | Travelling Salesman | 556 | 48 |
| 543 | 880 | Cantor Fractions | 554 | 48 |
| 544 | 429 | Word Transformation | 553 | 48 |
| 545 | 10596 | Morning Walk | 551 | 48 |
| 546 | 10249 | The Grand Dinner | 550 | 48 |
| 547 | 10422 | Knights in FEN | 550 | 48 |
| 548 | 535 | Globetrotter | 548 | 48 |
| 549 | 10001 | Garden of Eden | 547 | 48 |
| 550 | 10326 | The Polynomial Equation | 547 | 48 |
| 551 | 703 | Triple Ties: The Organizer's Nightmare | 546 | 49 |
| 552 | 184 | Laser Lines | 544 | 49 |
| 553 | 10493 | Cats, with or without Hats | 544 | 49 |
| 554 | 10393 | The One-Handed Typist | 542 | 49 |
| 555 | 11005 | Cheapest Base | 539 | 49 |
| 556 | 379 | Hi-Q | 538 | 49 |
| 557 | 617 | Nonstop Travel | 537 | 49 |
| 558 | 714 | Copying Books | 536 | 49 |
| 559 | 10065 | Useless Tile Packers | 536 | 49 |
| 560 | 11063 | B2-Sequence | 536 | 49 |
| 561 | 10016 | Flip-Flop the Squarelotron | 534 | 50 |
| 562 | 10651 | Pebble Solitaire | 534 | 50 |
| 563 | 10803 | Thunder Mountain | 534 | 50 |
| 564 | 10364 | Square | 532 | 50 |
| 565 | 11069 | A Graph Problem | 532 | 50 |
| 566 | 601 | The PATH | 530 | 50 |
| 567 | 10813 | Traditional BINGO | 530 | 50 |
| 568 | 434 | Matty's Blocks | 529 | 50 |
| 569 | 10680 | LCM | 527 | 50 |
| 570 | 10930 | A-Sequence | 527 | 50 |
| 571 | 10653 | Bombs! NO they are Mines!! | 526 | 50 |
| 572 | 10210 | Romeo and Juliet ! | 525 | 50 |
| 573 | 10926 | How Many Dependencies? | 525 | 50 |
| 574 | 11040 | Add bricks in the wall | 525 | 50 |
| 575 | 10199 | Tourist Guide | 523 | 51 |
| 576 | 10908 | Largest Square | 523 | 51 |
| 577 | 550 | Multiplying by Rotation | 521 | 51 |
| 578 | 590 | Always on the run | 516 | 51 |
| 579 | 208 | Firetruck | 515 | 51 |
| 580 | 10374 | Election | 514 | 52 |
| 581 | 10667 | Largest Block | 514 | 52 |
| 582 | 10200 | Prime Time | 513 | 52 |
| 583 | 10330 | Power Transmission | 512 | 52 |
| 584 | 10518 | How Many Calls? | 511 | 52 |
| 585 | 10147 | Highways | 510 | 52 |
| 586 | 273 | Jack Straws | 508 | 52 |
| 587 | 347 | Run, Run, Runaround Numbers | 508 | 52 |
| 588 | 10910 | Marks Distribution | 508 | 52 |
| 589 | 10061 | How many zero's and how many digits ? | 506 | 52 |
| 590 | 10088 | Trees on My Island | 506 | 52 |
| 591 | 855 | Lunch in Grid City | 505 | 52 |
| 592 | 10849 | Move the bishop | 505 | 52 |
| 593 | 10507 | Waking up brain | 502 | 53 |
| 594 | 10946 | You want what filled? | 502 | 53 |
| 595 | 165 | Stamps | 501 | 53 |
| 596 | 454 | Anagrams | 501 | 53 |
| 597 | 10306 | e-Coins | 501 | 53 |
| 598 | 327 | Evaluating Simple C Expressions | 499 | 53 |
| 599 | 10171 | Meeting Prof. Miguel... | 498 | 53 |
| 600 | 10791 | Minimum Sum LCM | 497 | 53 |
| 601 | 10044 | Erdos Numbers | 496 | 53 |
| 602 | 10763 | Foreign Exchange | 495 | 54 |
| 603 | 688 | Mobile Phone Coverage | 494 | 54 |
| 604 | 10739 | String to Palindrome | 493 | 54 |
| 605 | 10880 | Colin and Ryan | 490 | 54 |
| 606 | 10780 | Again Prime? No Time. | 489 | 54 |
| 607 | 10371 | Time Zones | 488 | 54 |
| 608 | 843 | Crypt Kicker | 485 | 55 |
| 609 | 10620 | A Flea on a Chessboard | 485 | 55 |
| 610 | 318 | Domino Effect | 483 | 55 |
| 611 | 471 | Magic Numbers | 482 | 55 |
| 612 | 10602 | Editor Nottobad | 481 | 55 |
| 613 | 11074 | Draw Grid | 481 | 55 |
| 614 | 11015 | 05-2 Rendezvous | 479 | 55 |
| 615 | 186 | Trip Routing | 478 | 55 |
| 616 | 10391 | Compound Words | 477 | 56 |
| 617 | 10484 | Divisibility of Factors | 477 | 56 |
| 618 | 381 | Making the Grade | 476 | 56 |
| 619 | 677 | All Walks of length ``n'' from the first node | 476 | 56 |
| 620 | 10446 | The Marriage Interview :-) | 476 | 56 |
| 621 | 10773 | Back to Intermediate Math | 476 | 56 |
| 622 | 255 | Correct Move | 475 | 56 |
| 623 | 10527 | Persistent Numbers | 475 | 56 |
| 624 | 10202 | Pairsumonious Numbers | 474 | 56 |
| 625 | 10497 | Sweet Child Makes Trouble | 474 | 56 |
| 626 | 457 | Linear Cellular Automata | 473 | 56 |
| 627 | 556 | Amazing | 473 | 56 |
| 628 | 741 | Burrows Wheeler Decoder | 472 | 56 |
| 629 | 796 | Critical Links | 472 | 56 |
| 630 | 10304 | Optimal Binary Search Tree | 471 | 56 |
| 631 | 743 | The MTM Machine | 470 | 56 |
| 632 | 10689 | Yet another Number Sequence | 469 | 56 |
| 633 | 526 | String Distance and Transform Process | 467 | 57 |
| 634 | 10268 | 498-bis | 467 | 57 |
| 635 | 10271 | Chopsticks | 467 | 57 |
| 636 | 162 | Beggar My Neighbour | 465 | 57 |
| 637 | 10126 | Zipf's Law | 465 | 57 |
| 638 | 627 | The Net | 464 | 57 |
| 639 | 584 | Bowling | 462 | 57 |
| 640 | 10705 | The Fun Number System | 462 | 57 |
| 641 | 10522 | Height to Area | 460 | 58 |
| 642 | 11001 | Necklace | 460 | 58 |
| 643 | 11150 | Cola | 459 | 58 |
| 644 | 10738 | Riemann vs Mertens | 458 | 58 |
| 645 | 705 | Slash Maze | 457 | 58 |
| 646 | 10820 | Send a Table | 457 | 58 |
| 647 | 622 | Grammar Evaluation | 456 | 58 |
| 648 | 10928 | My Dear Neighbours | 456 | 58 |
| 649 | 245 | Uncompress | 454 | 58 |
| 650 | 314 | Robot | 454 | 58 |
| 651 | 10005 | Packing polygons | 454 | 58 |
| 652 | 10617 | Again Palindrome | 451 | 59 |
| 653 | 638 | Finding Rectangles | 450 | 59 |
| 654 | 704 | Colour Hash | 450 | 59 |
| 655 | 10060 | A hole to catch a man | 450 | 59 |
| 656 | 10669 | Three powers | 450 | 59 |
| 657 | 10920 | Spiral Tap | 449 | 59 |
| 658 | 143 | Orchard Trees | 448 | 59 |
| 659 | 538 | Balancing Bank Accounts | 446 | 59 |
| 660 | 10132 | File Fragmentation | 444 | 60 |
| 661 | 10650 | Determinate Prime | 444 | 60 |
| 662 | 517 | Word | 442 | 60 |
| 663 | 551 | Nesting a Bunch of Brackets | 442 | 60 |
| 664 | 588 | Video Surveillance | 440 | 60 |
| 665 | 10307 | Killing Aliens in Borg Maze | 440 | 60 |
| 666 | 10309 | Turn the Lights Off | 439 | 60 |
| 667 | 586 | Instant Complexity | 438 | 60 |
| 668 | 10801 | Lift Hopping | 438 | 60 |
| 669 | 10090 | Marbles | 437 | 61 |
| 670 | 10354 | Avoiding Your Boss | 436 | 61 |
| 671 | 10925 | Krakovia | 436 | 61 |
| 672 | 168 | Theseus and the Minotaur | 435 | 61 |
| 673 | 209 | Triangular Vertices | 435 | 61 |
| 674 | 468 | Key to Success | 434 | 61 |
| 675 | 547 | DDF | 433 | 61 |
| 676 | 10022 | Delta-wave | 432 | 61 |
| 677 | 10721 | Bar Codes | 432 | 61 |
| 678 | 10337 | Flight Planner | 431 | 61 |
| 679 | 10460 | Find the Permuted String | 431 | 61 |
| 680 | 10865 | Brownie Points | 431 | 61 |
| 681 | 196 | Spreadsheet | 428 | 62 |
| 682 | 10233 | Dermuba Triangle | 428 | 62 |
| 683 | 10226 | Hardwood Species | 427 | 62 |
| 684 | 10871 | Primed Subsequence | 426 | 62 |
| 685 | 11039 | Building designing | 425 | 62 |
| 686 | 222 | Budget Travel | 424 | 62 |
| 687 | 10197 | Learning Portuguese | 422 | 63 |
| 688 | 290 | Palindroms <---> smordnilaP | 420 | 63 |
| 689 | 10120 | Gift?! | 420 | 63 |
| 690 | 756 | Biorhythms | 419 | 63 |
| 691 | 654 | Ratio | 418 | 63 |
| 692 | 833 | Water Falls | 418 | 63 |
| 693 | 10178 | Count the Faces. | 417 | 64 |
| 694 | 10503 | The dominoes solitaire | 417 | 64 |
| 695 | 11137 | Ingenuous Cubrency | 417 | 64 |
| 696 | 10541 | Stripe | 415 | 64 |
| 697 | 10154 | Weights and Measures | 414 | 64 |
| 698 | 418 | Molecules | 413 | 64 |
| 699 | 632 | Compression (II) | 413 | 64 |
| 700 | 10227 | Forests | 412 | 64 |
| 701 | 647 | Chutes and Ladders | 411 | 64 |
| 702 | 462 | Bridge Hand Evaluator | 410 | 65 |
| 703 | 296 | Safebreaker | 409 | 65 |
| 704 | 380 | Call Forwarding | 409 | 65 |
| 705 | 11219 | How old are you? | 409 | 65 |
| 706 | 501 | Black Box | 408 | 65 |
| 707 | 598 | Bundling Newspapers | 408 | 65 |
| 708 | 10896 | Known Plaintext Attack | 407 | 65 |
| 709 | 270 | Lining Up | 403 | 66 |
| 710 | 10201 | Adventures in Moving - Part IV | 403 | 66 |
| 711 | 10308 | Roads in the North | 403 | 66 |
| 712 | 10290 | {Sum+=i++} to Reach N | 402 | 66 |
| 713 | 10356 | Rough Roads | 402 | 66 |
| 714 | 321 | The New Villa | 401 | 66 |
| 715 | 10774 | Repeated Josephus | 400 | 66 |
| 716 | 10994 | Simple Addition | 399 | 66 |
| 717 | 177 | Paper Folding | 397 | 67 |
| 718 | 403 | Postscript | 397 | 67 |
| 719 | 10554 | Calories from Fat | 395 | 67 |
| 720 | 10092 | The Problem with the Problem Setter | 393 | 67 |
| 721 | 10325 | The Lottery | 393 | 67 |
| 722 | 616 | Coconuts, Revisited | 392 | 68 |
| 723 | 763 | Fibinary Numbers | 390 | 68 |
| 724 | 393 | The Doors | 389 | 68 |
| 725 | 10677 | Base Equality | 389 | 68 |
| 726 | 10776 | Determine The Combination | 389 | 68 |
| 727 | 815 | Flooded! | 388 | 68 |
| 728 | 220 | Othello | 387 | 68 |
| 729 | 11152 | Colourful Flowers | 387 | 68 |
| 730 | 10254 | The Priest Mathematician | 386 | 69 |
| 731 | 157 | Route Finding | 385 | 69 |
| 732 | 10284 | Chessboard in FEN | 385 | 69 |
| 733 | 10892 | LCM Cardinality | 384 | 69 |
| 734 | 139 | Telephone Tangles | 382 | 69 |
| 735 | 10453 | Make Palindrome | 382 | 69 |
| 736 | 10646 | What is the Card? | 382 | 69 |
| 737 | 10717 | Mint | 382 | 69 |
| 738 | 10585 | Center of symmetry | 381 | 70 |
| 739 | 10440 | Ferry Loading II | 376 | 70 |
| 740 | 11078 | Open Credit System | 374 | 71 |
| 741 | 10113 | Exchange Rates | 373 | 71 |
| 742 | 10312 | Expression Bracketing | 373 | 71 |
| 743 | 172 | Calculator Language | 372 | 71 |
| 744 | 11089 | Fi-binary Number | 370 | 72 |
| 745 | 10029 | Edit Step Ladders | 369 | 72 |
| 746 | 10543 | Traveling Politician | 369 | 72 |
| 747 | 10610 | Gopher and Hawks | 369 | 72 |
| 748 | 313 | Intervals | 367 | 72 |
| 749 | 897 | Anagrammatic Primes | 365 | 73 |
| 750 | 670 | The dog task | 364 | 73 |
| 751 | 10959 | The Party, Part I | 363 | 73 |
| 752 | 665 | False coin | 362 | 73 |
| 753 | 10625 | GNU = GNU'sNotUnix | 362 | 73 |
| 754 | 11105 | Semi-prime H-numbers | 362 | 73 |
| 755 | 702 | The Vindictive Coach | 361 | 73 |
| 756 | 10150 | Doublets | 359 | 74 |
| 757 | 10856 | Recover Factorial | 359 | 74 |
| 758 | 10387 | Billiard | 358 | 74 |
| 759 | 341 | Non-Stop Travel | 357 | 74 |
| 760 | 10603 | Fill | 357 | 74 |
| 761 | 10963 | The Swallowing Ground | 357 | 74 |
| 762 | 812 | Trade on Verweggistan | 356 | 74 |
| 763 | 10851 | 2D Hieroglyphs decoder | 356 | 74 |
| 764 | 10894 | Save Hridoy | 355 | 75 |
| 765 | 10174 | Couple-Bachelor-Spinster Numbers. | 354 | 75 |
| 766 | 10313 | Pay the Price | 354 | 75 |
| 767 | 11115 | Uncle Jack | 354 | 75 |
| 768 | 137 | Polygons | 353 | 75 |
| 769 | 345 | It's Ir-Resist-Able! | 353 | 75 |
| 770 | 10181 | 15-Puzzle Problem | 353 | 75 |
| 771 | 10806 | Dijkstra, Dijkstra. | 353 | 75 |
| 772 | 11220 | Decoding the message. | 353 | 75 |
| 773 | 11068 | An Easy Task | 352 | 75 |
| 774 | 181 | Hearts | 351 | 75 |
| 775 | 10718 | Bit Mask | 351 | 75 |
| 776 | 657 | The die is cast | 350 | 76 |
| 777 | 10401 | Injured Queen Problem | 350 | 76 |
| 778 | 11076 | Add Again | 350 | 76 |
| 779 | 11067 | Little Red Riding Hood | 348 | 76 |
| 780 | 10891 | Game of Sum | 347 | 76 |
| 781 | 614 | Mapping the Route | 345 | 77 |
| 782 | 10637 | Coprimes | 345 | 77 |
| 783 | 10679 | I Love Strings!! | 345 | 77 |
| 784 | 11173 | Grey Codes | 345 | 77 |
| 785 | 493 | Rational Spiral | 342 | 77 |
| 786 | 10986 | Sending email | 342 | 77 |
| 787 | 10912 | Simple Minded Hashing | 341 | 78 |
| 788 | 11056 | Formula 1 | 341 | 78 |
| 789 | 545 | Heads | 339 | 78 |
| 790 | 10212 | The Last Non-zero Digit. | 339 | 78 |
| 791 | 10672 | Marbles on a tree | 339 | 78 |
| 792 | 10895 | Matrix Transpose | 339 | 78 |
| 793 | 548 | Tree | 338 | 78 |
| 794 | 871 | Counting Cells in a Blob | 338 | 78 |
| 795 | 11085 | Back to the 8-Queens | 337 | 79 |
| 796 | 427 | FlatLand Piano Movers | 336 | 79 |
| 797 | 710 | The Game | 336 | 79 |
| 798 | 11003 | Boxes | 336 | 79 |
| 799 | 388 | Galactic Import | 335 | 79 |
| 800 | 339 | SameGame Simulation | 334 | 79 |
| 801 | 10586 | Polynomial Remains | 332 | 80 |
| 802 | 10947 | Bear with me, again.. | 332 | 80 |
| 803 | 11151 | Longest Palindrome | 331 | 80 |
| 804 | 11054 | Wine trading in Gergovia | 330 | 80 |
| 805 | 10616 | Divisible Group Sums | 328 | 81 |
| 806 | 349 | Transferable Voting (II) | 327 | 81 |
| 807 | 10382 | Watering Grass | 327 | 81 |
| 808 | 10576 | Y2K Accounting Bug | 327 | 81 |
| 809 | 10742 | The New Rule in Euphomia | 327 | 81 |
| 810 | 10047 | The Monocycle | 326 | 81 |
| 811 | 10482 | The Candyman Can | 326 | 81 |
| 812 | 776 | Monkeys in a Regular Forest | 325 | 81 |
| 813 | 10520 | Determine it | 325 | 81 |
| 814 | 10578 | The Game of 31 | 325 | 81 |
| 815 | 668 | Parliament | 324 | 82 |
| 816 | 589 | Pushing Boxes | 323 | 82 |
| 817 | 732 | Anagrams by Stack | 323 | 82 |
| 818 | 10075 | Airlines | 323 | 82 |
| 819 | 150 | Double Time | 322 | 82 |
| 820 | 135 | No Rectangles | 320 | 83 |
| 821 | 10528 | Major Scales | 320 | 83 |
| 822 | 10830 | A New Function | 320 | 83 |
| 823 | 447 | Population Explosion | 319 | 83 |
| 824 | 565 | Pizza Anyone? | 318 | 83 |
| 825 | 11064 | Number Theory | 318 | 83 |
| 826 | 10670 | Work Reduction | 317 | 84 |
| 827 | 10978 | Let's Play Magic! | 317 | 84 |
| 828 | 557 | Burger | 316 | 84 |
| 829 | 10259 | Hippity Hopscotch | 316 | 84 |
| 830 | 10406 | Cutting tabletops | 316 | 84 |
| 831 | 10842 | Traffic Flow | 316 | 84 |
| 832 | 179 | Code Breaking | 315 | 84 |
| 833 | 865 | Substitution Cypher | 314 | 84 |
| 834 | 11042 | Complex, difficult and complicated | 314 | 84 |
| 835 | 11244 | Counting Stars | 313 | 85 |
| 836 | 10911 | Forming Quiz Teams | 311 | 85 |
| 837 | 11012 | Cosmic Cabbages | 311 | 85 |
| 838 | 302 | John's trip | 310 | 85 |
| 839 | 892 | Finding words | 310 | 85 |
| 840 | 10532 | Combination! Once Again | 310 | 85 |
| 841 | 10536 | Game of Euler | 310 | 85 |
| 842 | 10662 | The Wedding | 310 | 85 |
| 843 | 10720 | Graph Construction | 310 | 85 |
| 844 | 467 | Synching Signals | 309 | 86 |
| 845 | 10635 | Prince and Princess | 309 | 86 |
| 846 | 10296 | Jogging Trails | 308 | 86 |
| 847 | 10991 | Region | 307 | 86 |
| 848 | 520 | Append | 306 | 87 |
| 849 | 10574 | Counting Rectangles | 305 | 87 |
| 850 | 11233 | Deli Deli | 305 | 87 |
| 851 | 533 | Equation Solver | 304 | 87 |
| 852 | 10058 | Jimmi's Riddles | 304 | 87 |
| 853 | 10264 | The Most Potent Corner | 304 | 87 |
| 854 | 10333 | The Tower of ASCII | 304 | 87 |
| 855 | 10821 | Constructing BST | 304 | 87 |
| 856 | 10017 | The Never Ending Towers of Hanoi | 303 | 87 |
| 857 | 10261 | Ferry Loading | 302 | 88 |
| 858 | 11062 | Andy's Second Dictionary | 301 | 88 |
| 859 | 11207 | The easiest way | 301 | 88 |
| 860 | 633 | A Chess Knight | 300 | 88 |
| 861 | 10250 | The Other Two Trees | 300 | 88 |
| 862 | 10681 | Teobaldo's Trip | 300 | 88 |
| 863 | 993 | Product of digits | 299 | 89 |
| 864 | 10097 | The Color Game | 299 | 89 |
| 865 | 10862 | Connect the Cable Wires | 299 | 89 |
| 866 | 11045 | My T-shirt suits me | 298 | 89 |
| 867 | 10094 | Place the Guards | 297 | 89 |
| 868 | 11223 | O: dah dah dah! | 297 | 89 |
| 869 | 338 | Long Multiplication | 296 | 89 |
| 870 | 521 | Gossiping | 296 | 89 |
| 871 | 10167 | Birthday Cake | 296 | 89 |
| 872 | 10217 | A Dinner with Schwarzenegger!!! | 296 | 89 |
| 873 | 10555 | Dead Fraction | 296 | 89 |
| 874 | 10351 | Cutting Diamonds | 295 | 90 |
| 875 | 10083 | Division | 294 | 90 |
| 876 | 10203 | Snow Clearing | 294 | 90 |
| 877 | 171 | Car Trialling | 292 | 91 |
| 878 | 10957 | So Doku Checker | 292 | 91 |
| 879 | 276 | Egyptian Multiplication | 289 | 92 |
| 880 | 10771 | Barbarian tribes | 289 | 92 |
| 881 | 242 | Stamps and Envelope Size | 288 | 92 |
| 882 | 10164 | Number Game | 288 | 92 |
| 883 | 10785 | The Mad Numerologist | 288 | 92 |
| 884 | 11222 | Only I did it! | 288 | 92 |
| 885 | 10410 | Tree Reconstruction | 287 | 92 |
| 886 | 10466 | How Far? | 287 | 92 |
| 887 | 346 | Getting Chorded | 286 | 93 |
| 888 | 529 | Addition Chains | 286 | 93 |
| 889 | 10685 | Nature | 285 | 93 |
| 890 | 11086 | Composite Prime | 285 | 93 |
| 891 | 185 | Roman Numerals | 284 | 93 |
| 892 | 753 | A Plug for UNIX | 284 | 93 |
| 893 | 824 | Coast Tracker | 284 | 93 |
| 894 | 10158 | War | 284 | 93 |
| 895 | 10564 | Paths through the Hourglass | 283 | 94 |
| 896 | 10480 | Sabotage | 282 | 94 |
| 897 | 428 | Swamp County Roofs | 280 | 95 |
| 898 | 662 | Fast Food | 280 | 95 |
| 899 | 718 | Skyscraper Floors | 280 | 95 |
| 900 | 385 | DNA Translation | 279 | 95 |
| 901 | 523 | Minimum Transport Cost | 279 | 95 |
| 902 | 10232 | Bit-wise Sequence | 279 | 95 |
| 903 | 518 | Time | 278 | 95 |
| 904 | 10146 | Dictionary | 278 | 95 |
| 905 | 735 | Dart-a-Mania | 277 | 96 |
| 906 | 10557 | XYZZY | 277 | 96 |
| 907 | 10562 | Undraw the Trees | 277 | 96 |
| 908 | 10759 | Dice Throwing | 276 | 96 |
| 909 | 410 | Station Balance | 275 | 96 |
| 910 | 10187 | From Dusk Till Dawn | 275 | 96 |
| 911 | 11058 | Encoding | 275 | 96 |
| 912 | 10043 | Chainsaw Massacre | 274 | 97 |
| 913 | 10263 | Railway | 274 | 97 |
| 914 | 11093 | Just Finish it up | 274 | 97 |
| 915 | 452 | Project Scheduling | 273 | 97 |
| 916 | 10257 | Dick and Jane | 273 | 97 |
| 917 | 10634 | Say NO to Memorization | 273 | 97 |
| 918 | 10716 | Evil Straw Warts Live | 273 | 97 |
| 919 | 375 | Inscribed Circles and Isosceles Triangles | 272 | 97 |
| 920 | 10787 | Modular Equations | 272 | 97 |
| 921 | 10792 | The Laurel-Hardy Story | 272 | 97 |
| 922 | 10823 | Of Circles and Squares | 272 | 97 |
| 923 | 10510 | Cactus | 271 | 98 |
| 924 | 10328 | Coin Toss | 270 | 98 |
| 925 | 603 | Parking Lot | 269 | 98 |
| 926 | 10964 | Strange Planet | 269 | 98 |
| 927 | 308 | Tin Cutter | 268 | 99 |
| 928 | 604 | The Boggle Game | 267 | 99 |
| 929 | 10668 | Expanding Rods | 267 | 99 |
| 930 | 178 | Shuffling Patience | 266 | 100 |
| 931 | 433 | Bank (Not Quite O.C.R.) | 266 | 100 |
| 932 | 10419 | Sum-up the Primes | 266 | 100 |
| 933 | 10666 | The Eurocup is Here! | 266 | 100 |
| 934 | 10733 | The Colored Cubes | 266 | 100 |
| 935 | 10396 | Vampire Numbers | 265 | 100 |
| 936 | 10855 | Rotated square | 265 | 100 |
| 937 | 211 | The Domino Effect | 264 | 100 |
| 938 | 613 | Numbers That Count | 264 | 100 |
| 939 | 10495 | Conic Distance | 264 | 100 |
| 940 | 10626 | Buying Coke | 264 | 100 |
| 941 | 10902 | Pick-up Sticks | 264 | 100 |
| 942 | 11110 | Equidivisions | 264 | 100 |
| 943 | 198 | Peter's Calculator | 263 | 101 |
| 944 | 10917 | Walk Through the Forest | 263 | 101 |
| 945 | 592 | Island of Logic | 262 | 101 |
| 946 | 10814 | Simplifying Fractions | 262 | 101 |
| 947 | 837 | Light and Transparencies | 261 | 101 |
| 948 | 10111 | Find the Winning Move | 261 | 101 |
| 949 | 10428 | The Roots | 261 | 101 |
| 950 | 11029 | Leading and Trailing | 261 | 101 |
| 951 | 11221 | Magic square palindromes. | 261 | 101 |
| 952 | 10039 | Railroads | 259 | 102 |
| 953 | 158 | Calendar | 258 | 103 |
| 954 | 852 | Deciding victory in Go | 258 | 103 |
| 955 | 10505 | Montesco vs Capuleto | 258 | 103 |
| 956 | 10350 | Liftless EME | 257 | 103 |
| 957 | 10567 | Helping Fill Bates | 257 | 103 |
| 958 | 10816 | Travel in Desert | 257 | 103 |
| 959 | 10827 | Maximum sum on a torus | 257 | 103 |
| 960 | 10318 | Security Panel | 256 | 103 |
| 961 | 11100 | The Trip, 2007 | 256 | 103 |
| 962 | 599 | The Forrest for the Trees | 255 | 104 |
| 963 | 10439 | Temple of Dune | 254 | 104 |
| 964 | 230 | Borrowers | 253 | 105 |
| 965 | 10804 | Gopher Strategy | 253 | 105 |
| 966 | 10898 | Combo Deal | 253 | 105 |
| 967 | 395 | Board Silly | 252 | 105 |
| 968 | 671 | Spell checker | 252 | 105 |
| 969 | 11038 | How Many O's? | 252 | 105 |
| 970 | 11055 | Homogeneous squares | 252 | 105 |
| 971 | 745 | Numeric Puzzles Again! | 251 | 106 |
| 972 | 10874 | Segments | 251 | 106 |
| 973 | 948 | Fibonaccimal Base | 250 | 106 |
| 974 | 10278 | Fire Station | 248 | 107 |
| 975 | 10843 | Anne's game | 248 | 107 |
| 976 | 174 | Strategy | 246 | 108 |
| 977 | 257 | Palinwords | 246 | 108 |
| 978 | 561 | Jackpot | 246 | 108 |
| 979 | 845 | Gas Station Numbers | 245 | 108 |
| 980 | 10316 | Airline Hub | 245 | 108 |
| 981 | 10506 | The Ouroboros problem | 245 | 108 |
| 982 | 487 | Boggle Blitz | 244 | 109 |
| 983 | 10040 | Ouroboros Snake | 244 | 109 |
| 984 | 303 | Pipe | 243 | 109 |
| 985 | 307 | Sticks | 243 | 109 |
| 986 | 10246 | Asterix and Obelix | 243 | 109 |
| 987 | 974 | Kaprekar Numbers | 242 | 109 |
| 988 | 10688 | The Poor Giant | 242 | 109 |
| 989 | 563 | Crimewave | 241 | 110 |
| 990 | 10560 | Minimum Weight | 241 | 110 |
| 991 | 11026 | A Grouping Problem | 241 | 110 |
| 992 | 759 | The Return of the Roman Empire | 240 | 110 |
| 993 | 10504 | Hidden squares | 240 | 110 |
| 994 | 11133 | Eigensequence | 240 | 110 |
| 995 | 10980 | Lowest Price in Town | 238 | 111 |
| 996 | 405 | Message Routing | 237 | 112 |
| 997 | 10317 | Equating Equations | 237 | 112 |
| 998 | 10357 | Playball !!! | 237 | 112 |
| 999 | 10547 | Hidden Truth in Recurrence | 237 | 112 |
| 1000 | 707 | Robbery | 236 | 112 |
| 1001 | 10218 | Let's Dance !!! | 235 | 113 |
| 1002 | 10416 | Folding My T-Shirt | 235 | 113 |
| 1003 | 11060 | Beverages | 235 | 113 |
| 1004 | 215 | Spreadsheet Calculator | 234 | 113 |
| 1005 | 505 | Moscow time | 234 | 113 |
| 1006 | 869 | Airline Comparison | 234 | 113 |
| 1007 | 10215 | The Largest/Smallest Box ... | 234 | 113 |
| 1008 | 192 | Synchronous Design | 233 | 114 |
| 1009 | 519 | Puzzle (II) | 233 | 114 |
| 1010 | 10944 | Nuts for nuts.. | 232 | 114 |
| 1011 | 11002 | Towards Zero | 232 | 114 |
| 1012 | 10793 | The Orc Attack | 231 | 115 |
| 1013 | 10942 | Can of Beans | 231 | 115 |
| 1014 | 10086 | Test the Rods | 230 | 115 |
| 1015 | 10722 | Super Lucky Numbers | 230 | 115 |
| 1016 | 10745 | Dominant Strings | 230 | 115 |
| 1017 | 10483 | The Sum Equals the Product | 229 | 116 |
| 1018 | 10901 | Ferry Loading III | 229 | 116 |
| 1019 | 652 | Eight | 228 | 116 |
| 1020 | 10023 | Square root | 228 | 116 |
| 1021 | 10339 | Watching Watches | 228 | 116 |
| 1022 | 10389 | Subway | 228 | 116 |
| 1023 | 10421 | Critical Wave | 228 | 116 |
| 1024 | 10900 | So you want to be a 2n-aire? | 228 | 116 |
| 1025 | 10915 | War on Weather | 228 | 116 |
| 1026 | 11103 | WFF 'N PROOF | 228 | 116 |
| 1027 | 425 | Enigmatic Encryption | 227 | 117 |
| 1028 | 10349 | Antenna Placement | 227 | 117 |
| 1029 | 10593 | Kites | 227 | 117 |
| 1030 | 10425 | Mobile Destroyer | 226 | 117 |
| 1031 | 10819 | Trouble of 13-Dots | 226 | 117 |
| 1032 | 787 | Maximum Sub-sequence Product | 225 | 118 |
| 1033 | 10180 | Rope Crisis in Ropeland! | 225 | 118 |
| 1034 | 10288 | Coupons | 225 | 118 |
| 1035 | 10655 | Contemplation - Algebra | 225 | 118 |
| 1036 | 274 | Cat and Mouse | 224 | 118 |
| 1037 | 10243 | Fire! Fire!! Fire!!! | 224 | 118 |
| 1038 | 618 | Doing Windows | 222 | 119 |
| 1039 | 11049 | Basic wall maze | 222 | 119 |
| 1040 | 11108 | Tautology | 222 | 119 |
| 1041 | 298 | Race Tracks | 220 | 120 |
| 1042 | 10977 | Enchanted Forest | 220 | 120 |
| 1043 | 902 | Password Search | 219 | 121 |
| 1044 | 10537 | The Toll! Revisited | 219 | 121 |
| 1045 | 10710 | Chinese Shuffle | 219 | 121 |
| 1046 | 11022 | String Factoring | 219 | 121 |
| 1047 | 268 | Double Trouble | 218 | 121 |
| 1048 | 672 | Gangsters | 218 | 121 |
| 1049 | 10085 | The most distant state | 218 | 121 |
| 1050 | 11203 | Can you decide it for ME? | 218 | 121 |
| 1051 | 10021 | Cube in the labirint | 217 | 122 |
| 1052 | 10390 | Bean Counting | 217 | 122 |
| 1053 | 10535 | Shooter | 217 | 122 |
| 1054 | 658 | It's not a Bug, it's a Feature! | 216 | 123 |
| 1055 | 726 | Decode | 216 | 123 |
| 1056 | 10329 | Combinatorial Expression | 216 | 123 |
| 1057 | 10462 | Is There A Second Way Left? | 216 | 123 |
| 1058 | 10549 | Russian Dolls | 216 | 123 |
| 1059 | 10423 | Peter Takes a Tramway | 215 | 123 |
| 1060 | 10477 | The Hybrid Knight | 215 | 123 |
| 1061 | 415 | Sunrise | 214 | 124 |
| 1062 | 432 | Modern Art | 214 | 124 |
| 1063 | 10149 | Yahtzee | 214 | 124 |
| 1064 | 10320 | Cow Trouble! Help Please!! | 214 | 124 |
| 1065 | 182 | Bonus Bonds | 213 | 124 |
| 1066 | 10433 | Automorphic Numbers | 213 | 124 |
| 1067 | 10449 | Traffic | 213 | 124 |
| 1068 | 10459 | The Tree Root | 213 | 124 |
| 1069 | 10570 | Meeting with Aliens | 213 | 124 |
| 1070 | 10598 | Find the Latitude | 213 | 124 |
| 1071 | 10777 | God! Save me | 213 | 124 |
| 1072 | 10854 | Number of Paths | 213 | 124 |
| 1073 | 11034 | Ferry Loading IV | 213 | 124 |
| 1074 | 10024 | Curling up the cube | 212 | 125 |
| 1075 | 10471 | Can't be too GREEDY | 212 | 125 |
| 1076 | 10990 | Another New Function | 212 | 125 |
| 1077 | 914 | Jumping Champion | 211 | 126 |
| 1078 | 10540 | Flowers of a Beautiful Mind | 211 | 126 |
| 1079 | 11048 | Automatic Correction of Misspellings | 211 | 126 |
| 1080 | 387 | A Puzzling Problem | 210 | 126 |
| 1081 | 10118 | Free Candies | 210 | 126 |
| 1082 | 10378 | Complex Numbers | 210 | 126 |
| 1083 | 11231 | Black and white painting | 210 | 126 |
| 1084 | 451 | Poker Solitaire Evaluator | 209 | 127 |
| 1085 | 10385 | Duathlon | 209 | 127 |
| 1086 | 10746 | Crime Wave - The Sequel | 209 | 127 |
| 1087 | 10577 | Bounding box | 208 | 127 |
| 1088 | 10897 | Travelling Distance | 208 | 127 |
| 1089 | 858 | Berry Picking | 207 | 128 |
| 1090 | 312 | Crosswords (II) | 206 | 129 |
| 1091 | 10277 | Boastin' Red Socks | 206 | 129 |
| 1092 | 10445 | Make Polygon | 206 | 129 |
| 1093 | 570 | Stats | 205 | 129 |
| 1094 | 810 | A Dicey Problem | 205 | 129 |
| 1095 | 10342 | Always Late | 205 | 129 |
| 1096 | 10517 | Wind of Change! | 205 | 129 |
| 1097 | 10769 | Pillars | 205 | 129 |
| 1098 | 10958 | How Many Solutions? | 205 | 129 |
| 1099 | 11226 | Reaching the fix-point. | 205 | 129 |
| 1100 | 10386 | Circles in Triangle | 204 | 130 |
| 1101 | 11070 | The Good Old Times | 204 | 130 |
| 1102 | 10134 | AutoFish | 203 | 130 |
| 1103 | 10157 | Expressions | 203 | 130 |
| 1104 | 10475 | Help the Leaders | 203 | 130 |
| 1105 | 10545 | Maximal Quadrilateral | 203 | 130 |
| 1106 | 656 | Optimal Programs | 202 | 131 |
| 1107 | 10436 | Cheapest way | 201 | 132 |
| 1108 | 10609 | Fractal | 201 | 132 |
| 1109 | 10761 | Broken Keyboard | 201 | 132 |
| 1110 | 464 | Sentence/Phrase Generator | 200 | 132 |
| 1111 | 10660 | Citizen attention offices | 200 | 132 |
| 1112 | 10690 | Expression Again | 200 | 132 |
| 1113 | 11004 | Changing Roadmap | 200 | 132 |
| 1114 | 10343 | Base64 Decoding | 199给我老师的人工智能教程打call！http://blog.csdn.net/jiangjunshow
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