Question

Which two integers is √123 between?

Answer 1

9514 1404 393

Answer:

11 and 12

Explanation:

√123 ≈ 11.0905 lies between 11 and 12.

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Since you're familiar with your squares, you know ...

11^2 = 121

12^2 = 144

123 lies between 121 and 144, so √123 lies between 11 and 12.