Synopses & Reviews
Some of Mensa's best math brains have set this range of fiendish number questions of all shapes and sizes for every level of ability.
Synopsis
Some of Mensa's best math brains have set this range of fiendish number questions of all shapes and sizes for every level of ability. You'll find number grids, series problems, magic squares and much, much more -- but all you need to master these mind-teasers is a sense of fun, a methodical approach, common sense and patience.