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The Times & The Sunday Times
The Times & The Sunday Times
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Teaser 3145

Danny Roth
The Sunday Times
Danny Roth
The Sunday Times

Easier To Ask The Audience

“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?

Send your solution to: The Sunday Times Teaser 3145, PO Box 29, Colchester, Essex CO2 8GZ or email puzzle.entries@sunday-times.co.uk. The first two correct solutions opened after next Saturday each win a £20 Waterstones voucher. Open to 18+ UK & ROI residents only.

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Solution to Teaser 3143

180, 300, 320, 400 and 500mm

The winners will be published next week.