The square root of 123454321 is ______ .

111

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1111

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11111

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111111

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Solution

The correct option is C
11111

Observe the following pattern:

1² = 1

11² = 121

111² = 12321

1111² = 1234321

11111² = 123454321

Thus, the square root of 123454321 is 11111.

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