How many whole numbers are not natural numbers?

Successor of the largest $3$-digit number is:

How many natural numbers are in between $10$ and $22$?

Which of the following natural number do not have predecessor?

The multiplicative identity for whole numbers is _____.

The number of primes between $80$ and $90$ is/are _____.

The whole number which is not used as a divisor is _____.

The product of zero and a whole number gives _____.