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The number of digits in the square root of a number depends on the number.

If it is a square number, the square root will have a finite number of digits. If the number is not a square number then the square root will be an irrational number with an infinite, non-repeating decimal representation.

In both cases, the number of digits before the decimal point, in the square root of x will be the rounded value of 1+0.5*log10(x)

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Q: How many numbers does the square root have?
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How many numbers has square root?

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