1. Suppose you have a pond, there are an infinite number of water. Two existing empty bottle, were of 5 liters volume and 6 liters. The question is how these two kettle only get three liters of water from the pond?
2. a candle can point 60 minutes how to use two candles, without the aid of any tools, measure 45 minutes?
3. A manager has three daughters, three daughters ages add up to 13,3 daughter's age equals how the manager's age, a subsidiary managers know the age, but do not know the age of three daughters, says manager
Only one daughter's hair is black, and asked three daughters age is how much? why?