Contains 90 brilliant, ten-minute puzzles, to help train your brain. The wide variety of timed puzzles and exercises will keep you guessing and give your brain

This book is brimming with memory, word and number workouts, codes, battleships and mind-bending spot the differences, as well as Japanese puzzles including han

This brand-new book in the Clever Kids® series contains over 100 quick-fire number puzzles to exercise young minds. From number chains and simple calculations

Contains 101 quick-fire puzzles to exercise young minds; from memory games and simple calculations to spot the differences and jigsaw challenges.

A brain-teasing collection of mental workouts, designed to be solved in 10 minutes. Puzzlers of all skill levels: challenge yourself to tests of word and langua