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Sunday Times Teaser 2553 – The X-Factor

by Danny Roth

Published: 28 August 2011 (link)

George and Martha’s daughter entered a singing competition. The entrants were numbered from one upwards. The total number of entrants was a three- figure number and their daughter’s number was a two-figure number. The five digits used in those two numbers were all different and non-zero. Martha noted that the number of entrants was a single-digit multiple of their daughter’s number. George realised the same would be true if the two digits of their daughter’s number were reversed.

How many entrants were there?

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  1. Brian Gladman permalink

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