“And have you noticed that not one of us has hair that matches his or her name?” “By golly, you’re right!” exclaimed Professor White. If the woman’s hair isn’t brown, what color is it?

Of the many wonderful chessboard math problems, this one is my favorite because of its surprising solution. Who would expect the coloring of the squares to be the key to unlocking the puzzle? But ...

Discover the hands-on game that builds your toddler's early math, motor, and thinking skills beyond crosswords or mazes.

Find one million consecutive positive numbers, none of which are prime.

Puzzle Brain teaser: This 'tricky' nature-inspired math puzzle might stump you if you're not careful Can you solve this math equation featuring yellow dandelions, purple flowers and four-leaf clovers?

Mysterious banners at a Cambridge, Mass., subway stop have commuters scratching their heads. The signs, challenging passers-by to solve a complicated math problem, are actually a cryptic pitch by ...