When one number remains, will it be odd or even, or does it depend on the students’ choices? Show puzzle solution The final number will always be even. The board begins with 99 numbers on it, 50 of ...

Brain teasers are fun little puzzles that make you think in different ways. They might look simple at first, but they often have a twist that surprises you. Solving them gives your brain a good ...

Holidays bring celebration, rest and, for many families, long stretches of indoor time. For some, this means table top games quickly reappear on kitchen tables. Games provide opportunities for ...

A jigsaw puzzle company wants to design a new rectangular puzzle with a specific quirk: it must have the same number of edge pieces and interior pieces. Each piece begins as a square of the same size, ...

If you were a pirate trying to steal gold from other pirates, what would you do? If you were forced to deduce the color of your friend's hat to escape an eccentric magician, how might counting help?