Question

Which of the following is correct?

I honestly cannot tell the difference between your 2s and your 7s.
I honestly cannot tell the difference between your 2's and your 7's.
both

Answer 1

The correct answer would be

I honestly cannot tell the difference between your 2's and your 7's.

both

Answer 2

The second sentence: "I honestly cannot tell the difference between your 2's and your 7's." Would be your correct answer.