H. E. Dudeney, Amusements in Mathematics (1917) No. 92 · Puzzles · Arithmetical puzzles

Digital Square Numbers

Here are the nine digits so arranged that they form four square numbers: 9, 81, 324, 576. Now, can you put them all together so as to form a single square number--(I) the smallest possible, and (II) the largest possible?

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H. E. Dudeney, Amusements in Mathematics (1917) · No. 92

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