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by Brian Gladman on November 8, 2015

Sunday Times Teaser 2772 – Madam I’m Adam

by Victor Bryant

My friend chose a four digit palindrome [1] and asked me to guess it.

He gave me clues by telling me, in turn, whether it was divisible by the primes in increasing order (2, 3, …).

I was only able to work out his number when he got to 13.

What was it?

[1] In the Sunday Times, ‘a four digit palindome not the same as the teaser’s number.’  However, this wording makes it unsolvable.

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