If you think you excel in mathematics and logical thinking, here is a compilation of some tricky riddles which you might just find interesting. The only scenario wherein you are likely to find these riddles easy is, if you already know the answers.
update: I tried with all my songs and yes I know it doesn't work with every song. I just think it works if you play the song on time or it works with some sort of upbeat song. But yea, it doesn't work perfectly like you would expect.