find the sqaure root of121 and 169by repeted subtraction
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to find by repeated subtraction, subtract from even numbers
121=
121-1=120
120-3=117
117-5=112
112-7=105
105-9=96
96-11=85
85-13=72
72-15=57
57-17=40
40-19=21
21-21=0
here we subtract 11 times
so 121 square root will be 11.
169=
169-1=168-3=165-5=160-7=153-9=144-11=133-13=120-15=105-17=88-19=69-21=48-23=25-25=0
here we subtract 13 times , so 169 square root will be 13....
121=
121-1=120
120-3=117
117-5=112
112-7=105
105-9=96
96-11=85
85-13=72
72-15=57
57-17=40
40-19=21
21-21=0
here we subtract 11 times
so 121 square root will be 11.
169=
169-1=168-3=165-5=160-7=153-9=144-11=133-13=120-15=105-17=88-19=69-21=48-23=25-25=0
here we subtract 13 times , so 169 square root will be 13....
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