What is the smallest whole number? (Mention the answer in figures)

What is the smallest natural number? Write the answer in numeral.

The successor of a greatest $2$-digit number is always a _____ digit number. Write the answer in words.

The immediate successor of the smallest $3$-digit number is a _____

The immediate predecessor of the smallest $3$-digit number is _____ digit number. Write the answer in words.

Write $\text{'}\mathrm{Y}\text{'}$ for yes and $\text{'}\mathrm{N}\text{'}$ for no.

When two whole numbers are added or multiplied, their sum or product is again a whole number.

Write $\text{'}\mathrm{Y}\text{'}$ for yes and $\text{'}\mathrm{N}\text{'}$ for no.

Two whole numbers cannot be added or multiplied in any order.

When two whole numbers are added or multiplied in any order, will the result remain the same? $(\mathrm{Yes}/\mathrm{No})$

The sum or product of three numbers does not remain same irrespective of the grouping in any order (Yes/No).