Simple problems resolved

Good morning!

I added the files with the solutions.
They were created in Visual Studio 2010.

Here is a print screen of the VS Solution if you want to reproduce it:
![vs_solution](https://cloud.githubusercontent.com/assets/8064846/3478786/0748603c-0344-11e4-9cd8-14a79bd121ac.png)

The UnitTests project needs a reference to the SimpleProblems project.

Thank you for your time.
At first I had only 1 test for each one of the solutions and I thought that it is OK to have them in one place. Then i created the tests with the bad results near the other ones.

But now that you pointed it out and seeing that each function has 2 test methods, and can have even more, it would have been much better to have separated them from the beginning.