Puzzles
These puzzles are fascinating and fun. More about ingenuity than boring calculation. Try to think from a different angle. The answer might come to you in a flash of insight. Maybe the answer is simpler than it looks, maybe more complicated. Some of them you may have seen before. Try to solve the puzzle before you look at the solution.
12 Coins Puzzle
You have 12 coins and a 2-pan balance scale. One of the coins is counterfeit. the counterfeit coin is either slightly heavier or slightly lighter than all the others. Can you find the counterfeit coin in three weighings? Any change of coins on either side of the scale is considered to be a weighing.
Strange Symbols
Look at these strange symbols. There is a very familiar pattern to them. Can you figure out what symbol comes next.
Wine Glasses
Six Glasses are in a row. Three are full of wine and three are empty, in the following order: Empty, Full, Full, Full, Empty, Empty. By moving only one glass, arrange them so they are alternately full and empty.