| This compilation of 60 non-calculator puzzles has been designed to help students to improve their calculating skills using mental or written methods. There are 30 crossnumber puzzles and 30 nunumber puzzles of varying complexity, each providing a wealth of practice. They can be used on-screen, with a self-marking facility, or printed out for conventional pen and paper use. £55 plus VAT. Special discounts for existing BIG 60 customers. Buy with e-learning credits |