Squares and cubes
Each of the 12 white squares in the cross-figure grid shown is to be filled with a single digit. The four two-digit numbers and the four three-digit numbers created are either perfect squares or perfect cubes. These squares and cubes are all distinct, and one of the down answers is both a square and a cube. What are the answers to 6 across and 7 across?
WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 28 August. The Editor’s decision is final. Please send entries to Enigma 1760, Â鶹´«Ã½, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).
Answer to 1754 Elementary: There are 18 letters
The winner Andrew Cudbertson of Gorsedd, Flintshire, UK
Advertisement
