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Easy threes

I started with a list of six odd numbers, all divisible by 3 (and with no leading zeros, of course). Then I coded the numbers by consistently replacing digits by letters, with different letters used for different digits. The list then became:

MAY IMAGINE MAKING EASY ENIGMA EASIER

(a) Which letter represents 6?

(b) Which digit is represented by N?

WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 8 July. The Editor’s decision is final. Please send entries to Enigma 1548, New Å®ÉúСÊÓƵ, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1542 Recycling points: 27 items were metal

The winner Fiona Shen of Harrogate, North Yorkshire, UK