Solved problem 38
Solved problem 51
Solved problem 46
Solved problem 47 but does take a while.
Problem 47 better, yet not good enough in terms of time
Yet a little better for prob 47. Still not great
Solved problem 43
Starting again in ruby

Test with test_unit and rspec tests
Reorganized the code into proper folders
More efficient version to problem 5
Solved problem 11 in ruby
Added documentation for testing
Solved problem 12 in ruby
Tried to change prob 305 to understand an algorithm