Question

If $\mathrm{a}$ is whole number such that $\mathrm{a}+\mathrm{a}=\mathrm{a}$, then $\mathrm{a}$ is equal to

• A. $0$
• B. $1$
• C. $2$
• D. none of these.

Answer 1

The correct option is A

$0$

Additive identity — If $\mathrm{a}$ is any whole number then $\mathrm{a}+0=\mathrm{a}=0+\mathrm{a}$.

If $\mathrm{a}$ is whole number such that $\mathrm{a}+\mathrm{a}=\mathrm{a}$, then $\mathrm{a}$ is equal to $0$.

Hence, the correct option is (A).