Order, order!
I have written down a list of four positive whole numbers in increasing order. They are all less than 100, and no two of them have a common factor greater than 1. If I write the numbers in words, then each begins with a different letter of the alphabet and my list is also in alphabetical order. If I tripled the numbers, then the answers would be in reverse alphabetical order when written in words. If I then doubled those answers, the resulting numbers, when written in words, would be in alphabetical order once again.
What is my list of numbers?
WIN 拢15 will be awarded to the sender of the first correct answer opened on Wednesday 1 May. The Editor’s decision is final. Please send entries to Enigma 1743, New 女生小视频, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
Answer to 1737 Base jumping: The number on Basil’s new house is 647
The winner Peter Steinberg of Madison, Wisconsin, US
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