Question

Find the square root of the following number:

$1764$

• A. $42$
• B. $45$
• C. $49$
• D. $50$

Answer 1

The correct option is A $42$

$1764=2\times 2\times 3\times 3\times 7\times 7=2^2\times 3^2\times 7^2=(2\times 3\times 7{)}^2$

By pairing the prime factor, then the square root of

$1764=$ $2\times 3\times 7$ $=42$