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The answer 8 is the square root of 64 not 69

The square root of 81 is 9 so the

square root of 69 is between 8 and 9 somewhere.

The square of 8.3 = 68.89

The square of 8.4 = 70.56

so answer is between 8.3 and 8.4 which

eventually works out to the long answer of 8.306623862918075

Incidentally, adding 100 makes 169 which

does have an easy square root of 13 as

13 x 13 = 169

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8y ago

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