Grade School

Includes index.

Number notions / 1: A very brief history of numbers -- The importance of zero -- All you need is 0 and 1 -- A number with a name -- Plus or minus a puzzle: Arithmetic activities -- Numbers with direction -- Magic squares -- Game of 15 -- Solve a cross-number puzzle -- Multiplied and divided: Mighty multiplication -- Daunting division -- Prime numbers -- Radical reasoning: Growing by leaps and bounds -- Squares and radicals -- Three in a row -- How four can you go? -- Geometry games: An ancient math -- Basic geometry -- Circular reasoning -- Tampering with triangles -- On a treasure hunt -- Measurement mysteries: Measuring units -- Not by a long shot -- A weighty matter -- Stacking up zeroes -- Brain benders: Logical math -- In the enchanted kingdom -- In the land of confusion -- Probability puzzles: A probable cause -- Playing dice -- Even and odd -- An average day -- Random remainders: So what's left? -- Network puzzles -- Color my world -- An unsolved mystery -- Appendix A: Glossary of math terms -- Appendix B: Read all about it! -- Puzzle answers.