Question

After 169 give successive subtraction

Answer 1

To find square root of the no.:
169-1=168
168-3=165
165-5=160
160-7=153
153-9=144
144-11=133
133-13=120
120-15=105
105-17=88
88-19=69
69-21=48
48-23=25
25-25=0
The subtraction has been carried 13 times.
Thus,
$\sqrt{169}$
equals 13