Math Puzzles and Brainteasers, Grades 6-8 Math Puzzles and Brainteasers, Grades 6-8
2009
The Pocket Book of Frame Games The Pocket Book of Frame Games
2006
Math Puzzles and Brainteasers, Grades 3-5 Math Puzzles and Brainteasers, Grades 3-5
2009
The Big Brain Puzzle Book The Big Brain Puzzle Book
2016
Challenging Math Problems Challenging Math Problems
2015
Contemporary Brainteasers Contemporary Brainteasers
2017