Question

An irrational number between $2$ and $2.5$ is

• A. $\sqrt{12.5}$
• B. $\sqrt{11}$
• C. $\sqrt{5}$
• D. $\sqrt{22.5}$

Answer 1

The correct option is C $\sqrt{5}$

An irrational number between $2$ and $2.5$ is $\sqrt{2\times 2.5}=\sqrt{5}$ whose approximate value is $2.236$.