Answer:
It's 1, 2, 3, 4, 6, 9, 12, 18, 36.
Step-by-step explanation:
First of all the list must contain 1 and 36 so it is not the first or last choice.
Find the prime factors:
36 = 2*2*3*3
So the other factors are 2 and 3 and the products formed from these factors
which are 4, 6, 9, 12, 18.
