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Sunday Times Teaser 3145 – Easier To Ask The Audience

by Brian Gladman on January 1, 2023

by Danny Roth

Published Sunday January 01 2023 (link)

“I have forgotten the phone number!” complained Martha, about to phone a friend. “So have I!” replied George, “but I have some vague memories of it. It is a perfect square with all the digits different, and the last digit is equal to the number of digits to be dialled. The last-but-one digit is odd and one of the digits is zero. Also the second and third and last-but-one digits are all exact multiples of the first digit. Maybe you can work it out.”

Martha proceeded to dial the number correctly.

What number did she dial?

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