Square root of 100 by repeated subtraction

We need to find square root of 100 by repeated subtraction method.
It is done as follows:
100−1=99
99−3=96
96−5=91
91−7=84
84−9=75
75−11=64
64−13=51
51−15=36
36−17=19
19−19=0
Thus 10 is the square root of 100

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