State whether the following statements are true or false

Every whole number is an integer.

Is $\sqrt{8^{2}+15^{2}}$ a rational number or an irrational number ?

Fill in the blanks so as to make each of the following statements true (Final answer only)

$\sqrt{2} \cdot \sqrt{3} \cdot \sqrt{6}=\ldots \ldots .$

Insert a rational number and an irrational number between the following:

$0$ and $0.1$

Rationalise the denominator of the following:

$\frac{2+\sqrt{3}}{2-\sqrt{3}}$

Simplify the following expressions

$(\sqrt{15}+\sqrt{7})(\sqrt{15}-\sqrt{7})$