State the number which is a whole number but not a natural number.

For each question,select the proper option from four options given,to make the statement true: $\sqrt{5} \times \sqrt{5}$ is a / an $\ldots \ldots \ldots$ number.

Are the following statements true or false? Give reasons for your answers.
$(i)$ Every whole number is a natural number.
$(ii)$ Every integer is a rational number.
$(iii)$ Every rational number is an integer.

State whether the following statement is true or false:
Every whole number is an integer.

Insert a rational number and an irrational number between the following: $\sqrt{2}$ and $\sqrt{3}$

Insert a rational number and an irrational number between the following:
$0.0001$ and $0.001$