1 of 1 people found the following review helpful
Fun, Testing - 'Keeps you on the Ball'.,
This review is from: The "Daily Mail" 30 Second Challenge: v. 2 (Paperback)
This book is crammed full of testing sequences you must complete that involve taking a number and doing several things to it. With 3 sections (Beginners, Intermediate and Hard) you will never get bored of these little brain teasers. Excellent to keep your mind going and to keep yourself on the ball with maths. Just one a day is a benefit. Recommended to all.