A 6-digit positive integer N is squared to form a 12-digit number. The center six digits of N^2 constitute N. Determine all possible values of N.

(If 'abcdef' was the 6-digit number, then the 12-digit number would look like 'uvwabcdefxyz'.)

Will there be any further solution(s) if N contained a leading zero?

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Posted by petrophysicsnet on 2023-07-20 02:16:35