These sensational new math puzzles are packed with lost, hidden, and missing number challenges that will have you searching the nooks, crannies, and outer limit
"Fans will find this volume indispensable; casual readers will find it an attractive nuisance," observed Scientific American of this challenging compilation of
Research in mathematics is much more than solving puzzles, but most people will agree that solving puzzles is not just fun: it helps focus the mind and increase