Question

From which odd number you will get the value zero, for the square root of the number 64 using repeated subtracting method?

• A. 13
• B. 15
• C. 9
• D. 5

Answer 1

The correct option is B 15

Repeated subtraction method: Subtract successive odd numbers from the given number starting from 1 till the difference becomes zero.
So, 64 - 1 = 63
63 - 3 = 60
60 - 5 = 55
55 - 7 = 48
48 - 9 = 39
39 - 11 = 28
28 - 13 = 15
15 - 15 = 0.
15 is the odd number, we get the value of zero for the square root of the number 64.