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Find the square roots of 121 and 169 by the method of repeated subtraction.
To do:
We have to find the square roots of 121 and 169 by the method of repeated subtraction.
Solution:
$121-1=120$
$120-3=117$
$117-5=112$
$112-7=105$
$105-9=96$
$96-11=85$
$85-13=72$
$72-15=57$
$57-17=40$
$40-19=21$
$21-21=0$
Therefore, the square root of 121 is $11$.
$169-1=168$
$168-3=165$
$165-5=160$
$160-7=153$
$153-9=144$
$144-11=133$
$133-13=120$
$120-15=105$
$105-17=88$
$88-19=69$
$69-21=48$
$48-23=25$
$25-25=0$
Therefore, the square root of 169 is $13$.
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