Once you've mastered the easy puzzles, it's time to take it up a notch!
Features: -200 medium-level puzzles using addition, sumtraction, multiplication, and division -Introduction and instructions by Will Shortz -Puzzles range from 4-by-4 to 6-by-6We publiceren alleen reviews die voldoen aan de voorwaarden voor reviews. Bekijk onze voorwaarden voor reviews.