Puzzle Magazines - It's time for our weekly number puzzle! Test your quick maths skills by attempting these 30-second number puzzles without a calculator. You may want to use a pencil and
![NumberCrunch Volume 1: Train your brain with 150 addictive sums: Amazon.co.uk: Sun, The: 9780600620549: Books NumberCrunch Volume 1: Train your brain with 150 addictive sums: Amazon.co.uk: Sun, The: 9780600620549: Books](https://m.media-amazon.com/images/I/51kH6GZemPL._AC_UF894,1000_QL80_.jpg)
NumberCrunch Volume 1: Train your brain with 150 addictive sums: Amazon.co.uk: Sun, The: 9780600620549: Books
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