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Sunday Times Teaser 2536 – ELEMENTARY

by Danny Roth and Victor Bryant

Published: 1 May 2011 (link)

“Every number has some significance,” said Holmes, referring to his monograph on the subject. “Then what do you make of this?” asked Watson, scribbling a seven-digit number on the desk diary. “Apart from the obvious fact that it is your old Indian army number,” replied Holmes, “I see that it is the largest seven-digit number where the difference between it and its reverse is the cube of a factor of the number itself.”

What was Watson’s number?

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