Question

What least number must be multiplied to $12288$ so that the product becomes a perfect square?

• A. $2$
• B. $3$
• C. $4$
• D. $5$

Answer 1

The correct option is B $3$

$12288=2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 3$
So it is clear we need one more 3 to multiply to make perfect square
$\therefore 12288\times 3=36864=192$