Question

Find the sum of all natural numbers n such that 2021-n/99 is a natural number.

Answer 1

Step-by-step explanation:

you add 1 to a natural number, we get its successor. If you subtract 1 from a natural number, you get its predecessor.

Every natural number has a successor.

Every natural number except 1 has a predecessor.

Every whole number has a successor.

Every whole number except zero has a predecessor.

All natural numbers are whole numbers, but all whole numbers are not natural numbers.