Computing target number from numbers in a set

Question

I\'m working on a homework problem that asks me this:

Tiven a finite set of numbers, and a target number, find if the set can be used to calculate the target number

Answer 1

pusedo code:

Works(list, target)
for n in list
tmp=list.remove(n)
return Works(tmp,target+n) or Works(tmp,target-n) or Works(tmp, n-target) or ...

then you just have to put the base case in. I think I gave away to much.