Answer: 1, 10, 25
Step-by-step explanation:
Possible cube numbers: 1 4 9 16 25
To get to 36: +35 +32 +27 +20 +11
Multiples of 20: 1, 2, 4, 5, 10, 20
We can't get 35, 32, 27, or 20 exactly by adding two multiples of 20, so our only option left is to try to get 11 and, yay, it works (10+1)
Now, just put those numbers smallest to largest.
Honestly, I just guessed ;)