Question

Find the square root of a $1521$ by first principle method (Vargamula method)

• A. $39$
• B. $49$
• C. $31$
• D. $41$

Answer 1

The correct option is A $39$

Square root by vargamula method

$1521\Rightarrow$ factorize into its factors

$3|1521$

_________

$3|507$

_________

$13|169$

_________

$13|13$

_________

$1$

Therefore,

$\sqrt{729}=\sqrt{3\times 3\times 13\times 13}$

$=3\times 13$

$=39$.