Divisible in reverse
You have two problems to solve. Neither of your answers may have a leading zero.
1) What is the 5-digit positive integer divisible by 17 and 19 whose reverse is a larger integer also divisible by 17 and 19?
2) What is the 5-digit positive integer divisible by 7 and 23 whose reverse is a larger integer also divisible by 7 and 23?
WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 10 July. The Editor’s decision is final. Please send entries to Enigma 1753, Âé¶¹´«Ã½, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
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Answer to 1747 Mind your Ps and Qs: P=3 and Q=4
The winner Graham Holmes of Barham, Suffolk, UK



