[jimminy]

On the assumption that your question is verbatim what you give applicants, I'd say your success rate would be low. Your question lacks appropriate definition to be solved, in it's current state.

You have multiple types of folds that could be made, variable on direction, orientation, and fold distance. The only one really pertinent to this problem is fold distance. A paper folded 50 times could be 51 * thickness, if you don't define that the paper must be folded in half each time. If you enforce that it must be folded in half it becomes: (2^folds) * thickness.