The World's Hardest Quiz!

Think your up to it lets see!!!

1 How do spell Portable?
2 What is 100x100?
3 If I was in a race and i over took the person in fourth, what place would I be in?
4 How many Factors of 16 are there?
5 What colour do you get if u mix all the colours from the colour wheel?
6 A Man road in to town on Friday, stayed for three days and went back on Friday. How is this possible?
7 How much is a new Ipod Nano 8GB