Sherard III, Wade H. creator Gage, Rachel Designer and Illustrator text cb London Dale Seymour Publications 1990 monographic eng

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51 pages : illustrations ; 28 cm . 50 number puzzles encouraging problem solving & critical thinking skills for secondary students with an algebra background; each puzzle has 10 clues to help find an unknown number; answer key included By Wade H. Sherard III S55 L 512 9780866515368 FISKH 250820 20250820114010.0 8067 eng