Can you understand absolutely retarded questions?

Sort of like an un-official Impossible quiz.

1 24-15=seven
2 If a square's a triangle, what is a circle?
3 If a hobo on the street looks at you, what do you do?
4 seis!
5 Can people in a sound-proof room hear the people outside it?
6 Fire!!
7 A person once said "What the HELL?!?!" who was that person?