Question

The _______ are all the counting numbers.
a.integers
b.real numbers
c.absolute values
d.natural numbers

Answer 1

What do you believe it is?

Answer 2

Well, It can't be real numbers because zero is a real number but it's not a counting number. (No value.)

Answer 3

http://www.mathsisfun.com/whole-numbers.html Review over this, it may help you out a lot.

Answer 4

This is also a very good resource if you need extra help!

http://mathworld.wolfram.com/CountingNumber.html