Question

Mark the correct alternative in each of the following:

What is the additive identity element in the set of whole numbers?

(a) 0 (b) 1 (c) −1 (d) None of these

Answer 1

If a is a whole number then a + 0 = a = 0 + a.

Therefore, 0 is the additive identity element for addition of whole number because it does not change the identity or value of the whole number during the operation of addition.

Hence, the correct answer is option (a).