Eighty puzzles. The answers are easy! But getting there is the hard part. Uncover connections and identify hidden relationships until suddenly the answers are a

Here are enough tough puzzles to test your mental powers for hours and hours. Try this never-ending array of puzzles, challenges, funky facts, things to build,

Can you imagine the mirror image of a given object, or the best way to connect a series of geometrical shapes? These tricky puzzlers will test your ability to d

A man writes the same number, and nothing else, on 20 sheets of paper. Why? To figure this out--and hundreds of other mind-bending lateral puzzles, too--you'll