Just magic
Joe has been showing Penny how to calculate the numbers in a 3-by-3 magic square. Each row, column and main diagonal have the same totals. On the left is Penny鈥檚 first effort. But she thought it would make a good puzzle if all but one number were in the wrong position.
Which number is in its correct position?
WIN 拢15 will be awarded to the sender of the first correct answer opened on Wednesday 6 January. The Editor鈥檚 decision is final. Please send entries to Enigma 1572, 快猫短视频, Lacon House, 84 Theobald鈥檚 Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
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Answer to 1566 Consistently older: Harry鈥檚 current age is 57
The winner Neil Hodgson of Highclere, Berkshire, UK
