Question

Subtracting which odd number will get the value of $144$ for the square root of the number $169$ using the repeated subtraction method?

• A. $3$
• B. $5$
• C. $4$
• D. $6$

Answer 1

The correct option is B $5$

Repeated subtraction method: Subtract successive odd numbers from the given number starting from $1$ till the difference becomes zero.

So,

$169-1=168$
$168-3=165$
$165-5=160$
$160-7=153$
$153-9=144$

So, subtracting $5^{th}$ odd number successively to get the value of $144.$