Question

By splitting into prime factors, find the square root of $11025$.

• A. $1005$
• B. $105$
• C. $100$
• D. $115$

Answer 1

The correct option is B $105$

Prime factorisation of $11025=5^2\times 3^2\times 7^2$
$\sqrt{11025}=\sqrt{5^2\times 3^2\times 7^2}=5\times 3\times 7=105$.