With more than 500 assorted number and logic puzzles, this collection contains these favorites: Brain Trainer—72 mental math challenges; Cell Blocks—96 Japanese logic puzzles; Futoshiki—use the numbers 1-5 to fill in the 72 grids; Kakuro—64 mathematical crossword puzzles; KenKen—72 arithmetical logic puzzles; Set Square—72 mental arithmetic grids; and Suko—96 espresso Su Doku

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