Math Brain Teasers: 25 Puzzles with Step-by-Step Answers
25 math brain teasers with hints and step-by-step answers: quick mental-math puzzles for kids, then pizza cuts, painted cubes and jug puzzles for grown-ups.
math puzzles
25 math brain teasers with hints and step-by-step answers: quick mental-math puzzles for kids, then pizza cuts, painted cubes and jug puzzles for grown-ups.