Brain Games: The Greatest Puzzle Book Ever

From simple sums to amazing feats of mental agility! Amaze your friends and astound your family by adding, dividing, subtracting and multiplying sums that look simply impossible. With an easy-to-follow system for making even the hardest problem a complete doddle, now at last you use the amazing Brain Games hints, tips and insider secrets to make yourself into a contender for being a world champion with numbers. See more