Verified Answer :

not a multiple of 8 will be for example 12 - yes ?

First check the factors of 24:
1, 2, 3, 4, 6, 8, 12, 24.
Now cross out the numbers that are multiples of 8.
So cross out 8 and 24
Now the remaining numbers are your answer.

Answer: 1, 2, 3, 4, 6, and 12.

Hope this helps :)