$\sqrt{2}$ is a ........ number.

What type of decimal expansion is $0.9999...$? (Terminating,Non-terminating repeating,Non-terminating non-repeating)

$\pi$ is a . . . . . . type of number. (Rational,Irrational,Whole number)

If $p$ and $q$ are distinct prime integers,then their least common multiple $(LCM)$ is . . . . . . .

$\pi$ is a type of number known as:

If the Least Common Multiple $(LCM)$ of two numbers is equal to their product,then their Greatest Common Divisor $(GCD)$ is ........ .