Scientific American: Head Games - 48 Confounding Word & Math Puzzles Knowledge Cards Deck

Sample question from Scientific American Head Games: break one word into two parts with completely different meanings. As one word, it is a noun for 'a type of cloth.' The correct solution for the two words includes a verb meaning 'adheres' and another verb meaning 'attempt.'

With 48 cards per package, Knowledge Cards are a great source of condensed information--all in a deck the size of a pack of playing cards. Each card features a confounding question on one side, with the answer on the other side.

Size 3 1/4 x 4 inches.