Question

is an irrational number.

• A. $\sqrt{225}$
• B. 1.252525252....
• C. 5.562
• D. $\sqrt{29}$

Answer 1

The correct option is D $\sqrt{29}$

225 is a perfect square, so $\sqrt{225}=15$ which is a rational number.

5.562 is a terminating decimal, so it is a rational number.

$\mathrm{1.252525252....}$ is a recurring decimal, so it is a rational number.

29 is not a perfect square and $\sqrt{29}$ is a non terminating non recurring decimal. So, it is an irrational number.