Question

What is the geometric mean of $4$ and $16$?

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer 1

The correct option is D $8$

Geometric mean between two numbers $a$ and $b$ is equal to $\sqrt{ab}$.

Here $a=4,b=16$

Therefore, geometric mean $=$ $\sqrt{4\times 16}=8$