Which number is not a factor of 90?

Answer 1

Oh, that's a happy little question! Let's take a look at 90 and see which number doesn't fit in. Every number that can divide evenly into 90 is a factor, so we just need to find the one that doesn't quite fit the pattern. Can you see which number doesn't belong in this peaceful little group of factors?

Answer 2

Everything except 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

Answer 3

Everything except 1, 2, 3, 6, 7, 14, 21, 42.

Answer 4

Anything that isn't 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

Answer 5

Everything except 1, 2, 3, 6, 9, 18, 27, 54

Answer 6

Anything that isn't 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

Answer 7

Anything that isn't 1, 2, 3, 6, 7, 14, 21, 42

Answer 8

There are an infinite amount of numbers that are not factors of 90.

Answer 9

2,4,5,6,7,8,9,10,11,12,13,14,15,16...

Answer 10

Anything that isn't 1, 2, 4, 7, 14, 28