Leftovers
A set of snooker balls contains six coloured and 15 red balls. From such a set Harry took some coloured balls and a larger number of reds and put them in his bag. From the remainder Tom took some coloured balls and some reds (more of each than Harry took) and put them into his bag.
Each of them calculated that if he drew two balls at random out of his own bag simultaneously there was a 1 in X chance that they would both be coloured, X representing the same number for each person.
How many coloured balls and how many red balls from the set were not taken by either of them?
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WIN 拢15 will be awarded to the sender of the first correct answer opened on Wednesday 6 June. The Editor鈥檚 decision is final. Please send entries to Enigma 1696, 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 1690 Dolly the sheep: d+o+l+l+y=77
The winner Jackie Willmington of Bow Street, Ceredigion, UK
