The Mathsketeers are embroiled in a tricky mental maths adventure. Help the swashbuckling mice as they follow a trail of maths puzzles using addition, subtraction, multiplication and division, to defeat their feline nemesis.

It’s up to the reader to join the adventure, follow the story and work out the answer to each fiendish problem. There are lots of mental maths activities that will test children’s numeracy skills, answers to fill in, as well as helpful tips and tricks to learn along the way.