What is the whole square of 1111?

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• A 1234321
• B 1233421
• C 1243321
• D 1223431

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Answer: A. 1234321

Squares of repunits follow a pattern: 11^2 = 121, 111^2 = 12321, so 1111^2 counts up 1, 2, 3, 4 and back down: 1234321.

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