Super Fun Math Puzzles: Boost Logic, Focus, and Problem-Solving with Brain-Boost

Comic-Strip Math: Problem Solving: 80 Reproducible Cartoons With Dozens and Doze

Kumon Math Boosters: Problem Solving with Ratios & Proportions, Grades 4-6, Ages

Math-terpieces: The Art of Problem-Solving

Brain-Boosting Logic Puzzles for Adults - 50 Deductive Logic Grid Puzzles with S

Cryptoquip Puzzle Book for Adults: Boost Logic and Problem Solving Skills

Kumon Math Boosters: Problem Solving with Ratios & Proportions, Grades 4-6, Ages