How about all three?

0: Yes - Siberian Khatru

1: jan Misali - how many Super Mario games are there? (and the follow-up from a year later if you have time)

5: It can be mathematically proven that the fastest possible sorting algorithm has a time complexity of O(n log n). (I'm having trouble thinking of a fact that doesn't require knowledge of algebra, so I'm sorry if you don't understand what this means.)

I listened to "Terrapin". It was like something off of Pink Floyd's first album, but softer, which is pretty much what I expected, but still a good song.