maths Maths Puzzle

Find all 8-digit natural numbers n such that n2 ends in the same 8 digits as n. Numbers are written in standard decimal notation, with no leading zeroes.

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maths Other Question

Two similar triangles with integral sides have two of their sides the same. If the third sides differ by 20141, find all of the sides. Find all solutions of 3x + 4y = 5z, for integers x, y, and z.