Question

Which of the following is/are not the radical expression?

• A. $\sqrt{7}$
• B. $\sqrt{16}$
• C. $\sqrt{19}$
• D. $\sqrt{25}$

Answer 1

Answer: (B), (D)

The correct options are
B $\sqrt{16}$
D $\sqrt{25}$

In a surd ' ' symbol is called radical.
Here $\sqrt{7}$ and $\sqrt{19}$ are radical expression.
$\sqrt{16}$ = 4 and $\sqrt{25}$ = 5 which is a rational number, hence they are not surds
So, $\sqrt{16}$ and $\sqrt{25}$ are not radical expression.