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Sunday Times Teaser 2520

by Angela Newing

Published: 9 January 2011 (link)

I have a brand-new 11-digit phone number. The first and last digits are zero and the middle section uses each of the digits 1 to 9 once. If you called the number by pressing the buttons on the standard keypad of a modern phone, you would find no two consecutive digits of the number in the same row or column. Looking at the fifth and sixth digits, I see one is double the other. The second and third digits differ by two, the seventh is lower than the sixth and the 10th is odd, and one more than the eighth.

What is my number?

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  1. Brian Gladman permalink

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