Question

If 3 is removed from the whole numbers is the collection of all numbers closed under addition?

Answer 1

Answer:

No

Step-by-step explanation:

For closed we two any numbers form whole numbers, their sum must be in whole numbers.

Here if we take 1 & 2.

its sum 1+2=3

now 3 is not number of given condition whole numbers.( 3 is removed already from whole numbers)