Problem 093 added

1. Pick 4 digits (0-9) so that means we have the “10 choose 4″=210
different combinations.
2. Check all permutations of it. There are 4!=24 permutations.
3. For each permutation we need to test all combinations of the
operators.
There are 4 operators which can be arbitrarily picked for any of the 3
placements.
4. Search  4^3 = 64 times the number of solutions.
5. Check every combination of parenthesis. There are a total of 5
parenthesis combinations.