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How many times we have to subtract 64 to find its square root?

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answer is B.

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Detailed Solution

The number of odd numbers we subtract in this process is treated as the square root of 64.

64 – 1 = 63

63 – 3 = 60

60 – 5 = 55

55 – 7 = 48

48 – 9 = 39

39 – 11 = 28

28 – 13 = 15

15 -15 = 0

Thus, starting from 64, we have subtracted 8 times to obtain 0. Therefore, the square root of 64 is 8.

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