Question

______ is the only natural number which when multiplied to itself gives the number itself while ____ is the only whole number which when added to itself gives the number itself.

• A. $1$
• B. $0$

Answer 1

$1$ is the only natural number which when multiplied to itself gives the number itself while $0$ is the only whole number which when added to itself gives the number itself.

Hence, answers are $1$ and $0$.