Question

Which of the following rational numbers is equal to its reciprocal?

• A. $1$
• B. $2$
• C. $\frac{1}{2}$
• D. $0$

Answer 1

The correct option is A

$1$

The explanation for the correct option:

Reciprocal of any number $a$ is $\frac{1}{a}$.

Reciprocal of the number $1$ is $\frac{1}{1}=1$.

Thus, reciprocal of the number $1$ is equal to $1$itself.

Hence, Option A is correct

The explanation for the incorrect options:

Option B.Reciprocal of the number $2$ is $\frac{1}{2}$.

Option C. Reciprocal of the number $\frac{1}{2}$is $\frac{1}{{\displaystyle \frac{1}{2}}}=2$.

Option D. Reciprocal of the number $0$ is $\frac{1}{0}=\infty$ that is not defined.

Hence, Option B, Option C, and Option D are incorrect

Hence, the correct option is (A).