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Question 1 of 10

Most of the oxygen in the air is produced by what chemical process?

Question 2 of 10

Which of these devices would you most likely use to listen to music?

Question 3 of 10

Alfred J Gross invented this for doctors, who didn't like it, although the last people to use it were hospital doctors. Mind you, the tech behind it also powers garage openers. What is it?

Question 4 of 10

Which space probe landed on Mars in June 1999?

Question 5 of 10

What country shares its name with an ink that is chemically inert, not affected by sunlight and virtually permanent?

Question 6 of 10

At 11:38 a.m., on January 28, 1986, just 74 seconds into its 10th mission, an O-ring ruptured, setting off a fiery explosion in the main fuel tank of which space shuttle?

Question 7 of 10

What happens to the pressure of water as depth under the water increases?

Question 8 of 10

The grandfather paradox is held up as one of the risks of what improbable science fiction activity?

Question 9 of 10

Water freezes at what temperature?

Question 10 of 10

Wood's glass, which blocks most wavelengths of light, was originally used to encode messages. What kind of light does it let through?

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Can you name one of these Legendary Voices?

Which one is your favorite?
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Who Sang These Songs?

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Who sang these songs?

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Who Sang These Songs?
Who Sang These Songs?

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Who Sang These Songs?

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Can you do better than a 5 out of 10?
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Are you smarter than a astronaut? Prove us by score higher than a 6
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Science quiz for people with an IQ above 150!

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Do you like animals? Then this is the right quiz for you.

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Science Quiz. level Impossible

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Did you know this weird thing about Elon musk?

Elon Musk Quiz
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Can you beat this real chef? Tell us if you did!

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10 questions about food and beverage, can you score at lest 5 out of 10?

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10 food and beverages questions.
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Do you like books? Then this hard quiz about books and their writers!

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How much of knowledge about Literature have you stored in your brains?

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In the tall tale, what was the name of the giant lumberjack?

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Which of these have you seen in the cinema?
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Can you top a 6 out of 10
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It's highly doubtful you can complete even half of these movie titles in this quiz.

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What is the last movie you have seen?
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60s, 70s & 80s Horror: How Well Do You Remember the Nightmares?

Which one gave you nightmares?
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Math Quizzes

Math Quiz

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Math Examination

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Math Quiz

Only those who are good with numbers stand a change!
Unbeatable Math Quiz

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Nobody will score higher than a 4

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Only those who are good with numbers stand a chance!
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Can You Solve It Without a Calculator?
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