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The square root of a number between 10 and 11 can be approximated by finding the average of the square roots of 10 and 11. The square root of 10 is approximately 3.1623, and the square root of 11 is approximately 3.3166. Therefore, the square root of a number between 10 and 11 would be approximately 3.23945.
10 squared is 100. 20 squared is 400. 225 is between 100 and 400. Its square root will be between 10 and 20.
There are infinitely many square roots between 9 and 10.
There are 10 square numbers
9 x 9 = 81 and 10 x 10 = 100. So any number 82-99 would have a square root between 9 and 10.