Hitoshii

Hitoshii is a puzzle to whet the appetite of all those Su-doku solvers looking to stretch themselves further. Like Su-doku, you must fill the rows and columns with all the numbers from 1 up to the length of the row. And like Killer Su-dokus, there are also coloured lines bordering selections of squares, with a number telling you the sum of the figures within that border. Where Hitoshii goes further though, is that the sum of the numbers within this group can be arrived at by adding, subtracting, multiplying or dividing.

This great new puzzle tests your logical placement skills with the added challenge of tapping into your maths skills, so it can keep two parts of your brain ticking over at once!

• Contains over 180 puzzles
• Blends logical and arithmetical solving techniques
• Sharpens basic numeracy
• Simple-to-learn ‘rules’

Price: £5.99