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What are the three different digits that, whichever order you write them down in, form a three-digit integer that is not itself prime but is the product of two primes?
WIN 拢15 will be awarded to the sender of the first correct answer opened on Wednesday 5 August. The Editor鈥檚 decision is final. Please send entries to Enigma 1552, 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).
Answer to 1546 Mini-tangram: The area is 38.5 square centimetres
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The winner Narayan Ramanathan of Ahmadi, Kuwait