How many 2-digit numbers are multiples of 2 but not 4?

there are 90 2-digit numbers, right?
half of them are even (multiples of 2)
1/4 of them are multiples of 4
so, that leaves 1/4 that are even, but not multiples of 4.

almost. why not exactly?

How many two-digit numbers have unit digits 2, but are nor multiples of 4

23

pooop

69

23