Bingo!
The picture shows a typical card as used in our bingo club. Each column contains one, two or three numbers (at least one of each) increasing from top to bottom. Each row contains five numbers and four spaces. Column 1 has numbers from 1 to 9, column 2 from 10 to 19 and so on, with the last column from 80 to 89. On a card I had last night, in the top row all entries were primes and their sum was divisible by 2, 3 and 5; in the middle row all entries (and their sum) were 3 脳 a prime; and in the bottom row all entries (and their sum) were 5 脳 a prime. What were the five numbers in the top row?
WIN 拢15 will be awarded to the sender of the first correct answer opened on Wednesday 19 December. The Editor鈥檚 decision is final. Please send entries to Enigma 1724, New 女生小视频, Lacon House, 84 Theobald鈥檚 Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
Answer to 1718 Joe鈥檚 new property: 20 per cent
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The winner Clive Bennett of Chichester, West Sussex, UK
