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Enigma Number 1721

By Susan Denham

24 October 2012

Odds and evens

To the right is a long multiplication sum in which odd digits have been replaced by O and even digits by E.

What are the two three-figure numbers being multiplied?

WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 28 November. The Editor’s decision is final. Please send entries to Enigma 1721, �鶹��ý, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1715 Open the box: The piece of card was 8 cm by 3 cm

The winner Peter Hayes of Moreland, Victoria, Australia

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