Question

The variable among the following is .

• A. $5$
• B. $a$
• C. $\frac{13}{5}$
• D. $\pi$

Answer 1

The correct option is B $a$

$5$ is an integer, which has a fixed value. So, it cannot be used as a variable.

$a$ is a variable as it can take any value.

$\frac{13}{5}$ also has a fixed value, which cannot be used as a variable.

$\pi$ is a constant that has a fixed value close to the value of $\frac{22}{7}$. Hence it cannot be used as a variable.