All the nine digits are arranged here so as’ to form four square numbers:
9,
81, 324, 576
How would you put them together so as to
form a single smallest possible square number and a single largest possible
square number?
Answer:
the lowest square number I can think I can think, of containing all the nine
digits once and only once, is 139854276, the square of 11826, and the highest
square number under the same conditions is 923187456 the square of 30384.
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