Shown right is a cross-figure to complete. However, there are no across or down clues. Instead you have to ensure that: a) if an answer uses one of the numbered squares then that answer must be divisible by the little number in that square (for example the five-figure number in 1 down must be divisible by 1, 4 and 7; similarly the five-figure number in 7 across must be divisible by 7); b) in your answers, only two different digits can be used throughout, one of them odd and the other even; c) the odd digit must be written at most once in any row or column of the grid.
What are the answers to 1 across, and 7 across?
WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 20 November. The Editor’s decision is final. Please send entries to Enigma 1772, Â鶹´«Ã½, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
Advertisement
Answer to 1766 Triangular sums: The numbers are 6, 49, 23, 58 and 17
The winner Jesse Banwell of Ben Lomond, California, US
