Which one is the odd one out in the sequence 3, 5, 7, 12, 17, 19?

Interesting that 0 and 1 are the only two whole numbers that are neither prime nor composite.

If they’d listed 2 instead of 3, it would have been a lot better question.

That's an easy one for me because my teacher, Mr. Harris, drilled it into my head. R.I.P. in peace, SIR With Love.

AnnualEssay7, is zero a number?