Å®ÉúСÊÓƵ

Pascal’s pyramid

This is Pascal’s pyramid. Every stone has a positive number on it and, apart from the base stones, each stone’s number is the sum of the numbers of the two stones on which it rests. The numbers of the six base stones are all different.

What are A, B, C, D, E and F?

WIN £15 will be awarded to the sender of the first correct answer opened on Tuesday 19 August. The Editor’s decision is final. Please send entries to Enigma 1503, New Å®ÉúСÊÓƵ, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (include your postal address).

Answer to 1620 Pieces of eight: the candidates are C and G

The winner Allen Sawitz of Gadstrup, Denmark