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HARRY, Tom and I were challenged to find four perfect squares, two consisting of three digits, one of two digits and one of one digit, such that each of the nine digits 1-9 was used once.

We each produced a different valid solution, but each of their solution had one number in common with mine.

List in ascending order the numbers in my solution.

A £10 book token will be awarded to the sender of the first correct answer opened on Thursday 20 July. The Editor’s decision is final. Please send entries to Enigma 827, New Å®ÉúСÊÓƵ, King’s Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 821 was Ã…ke Nord of Sweden.

Answer to Enigma 821

Diminishing returns

937.