Think math riddles are tough? Think again! These easy-to-understand puzzles will challenge your mind and boost your confidence. Gather your friends or family and compete to see who solves them first.

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The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

In 1974, a geneticist named Marsha Jean Falco devised an ingenious research tool to help determine whether epilepsy in dogs was an inherited trait. She drew a series of symbols on index cards, where ...

Label the rectangles correctly with the letters A to I. Show puzzle solution Only the four blue-shaded rectangles below intersect three other rectangles, and therefore they must be F, G, H and I. H ...

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?