The hardest quiz in the world!

Think you're so clever? Take this quiz now to test your knowledge-warning, this is one hard quiz!

1 How many degrees is absolute zero?
2 Which one of these is extinct?
3 Six times six plus thirty-six divided by twelve=
4 What colour was the american ladies' gymnastic leotard in 2009 olympics?
5 What is a refractometer used for?