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Daley’s Gold

In July 2009, 16 months after winning the individual diving gold medal from the 10-metre platform board at the European Championships at the age of 13, Thomas Daley won the gold medal at the World Championships. So it is fitting that I can offer this puzzle:

In this subtraction, digits have been consistently replaced by letters, with different letters representing different digits. No number starts with a zero. Since there are 11 different letters, everything is in base 11 – use the digits 0 to 9 as normal and add a symbol of your choice for the extra digit.

Please send in the 6-digit number (still in base 11) that is represented by THOMAS.

WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 10 March. The Editor’s decision is final. Please send entries to Enigma 1581, New ÐÓ°ÉÔ­´´, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1575 All our days: the FAMOUS number is 528941

The winner Doug Fenna of Ryde, Isle of Wight, UK