Then this website is just what you need. You don't need any musical skills apart from begin able to tell whether the first few notes of the tune go up, down, or stay the same. Then, using a simple virtual keyboard, play your working out and wait for the answer. You don't need to know what the actual notes are, just be able to tell whether they go up, down or stay the same.

In addition to TuneSeeker's collection of tunes, results are also returned from Musipedia the Open Music Encyclopedia.