This latest collection from the famed Grabarchuk family—the preeminent creators of brain-teasing eye candy—bursts with color and creativity. And each one of these 303 diabolical teasers must be solved
A car dealer sells two cars for $9,999 each — one at a 10% profit, the other at a 10% loss. Overall, did the dealer make or lose money?How many common words of six letters can you make from "mac
In a foot race, Abe was neither first nor last. Cal beat Doug, Bruce beat Abe, Abe beat Ed but was beaten by Cal, and Doug beat Bruce. Who was last?Arrange four chess pieces so that every piece attack
"These and almost 300 other mathematical puzzles appear in this original collection, devised by world-renowned mathematicians, puzzle creators, and devoted puzzle lovers. A unique puzzle project, it u
This collection of more than one hundred original and highly sophisticated puzzles presents challenges that require creative, “outside of the box” thinking. Many different types of puzzles
