Question

Which of the following cannot be a factor of any positive integer?

• A. 1
• B. 0
• C. 2
• D. The number itself.

Answer 1

The correct option is B

0

For any number, 1 and the number itself are always its factors.
So, 2 is a factor of itself.
Hence, the options 1, the number itself and 2 can be a factors of a positive integer.

But, we know, the product of zero and any positive integer (infact, any number) is zero.
So, there is no positive integer which yields itself when multiplied by zero.
Hence, zero cannot be a factor of any positive integer.