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Extremely hard mixed knowledge quiz, how many did you answer correctly?

Question 1

The zipper was invented by who?

Question 2

What is the next number in the number sequence: 0, 2, 6, 14, 30, 62?

Question 3

Find the Highest Common Factor of these numbers - 39 and 65

Question 4

Bleach has a pH of roughly what number?

Question 5

What sort of singer is Willie Nelson, organiser of the Farm Aid charity?

Question 6

What is the answer to this simple equation: 8 + 2 x 2 = ?

Question 7

Who sang the famous song "I Believe In You" (1973)?

Question 8

2805+1874+943 equals what number?

Question 9

Who made the first nonstop solo flight across the Atlantic Ocean?

Question 10

Which country uses the internet domain code .tr?