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?
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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?
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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?
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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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History Quizzes
Very Hard History Quiz
Only people with an IQ of 140+ will score a 10
Average Score: 6
92% knows the answer to this question:
"Advertising of which product was banned from UK television in 1965?
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History Test
We bet you aren't smart enough for this one!
Average Score: 8
98% knows the answer to this question:
"What is the name of the waterproof item of clothing which is named after the Scotsman who started selling it in 1824?
"
You think you know your History?
Find out now in this Quiz
Average Score: 7
97% knows the answer to this question:
"President Antonio Segni resigned as the leader of what European country in 1964?
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History Quiz
Are you able to score a perfect 10?
Average Score: 9
98% knows the answer to this question:
"How old was Prince Harry when his mother died?
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Quiz About History
You will never score higher than a 6
Average Score: 7
100% knows the answer to this question:
"Caporetto was a battle in which country in Europe in World War I?
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History Quiz
Are you able to score a perfect 10?
Average Score: 9
99% knows the answer to this question:
"How old was Prince Harry when his mother died?
"
Hard History Quiz
Scoring a perfect 10 is only possible with an IQ of 135+
Average Score: 6
100% knows the answer to this question:
"Winchester in what Virginia valley changed hands 72 times during the Civil War?
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Difficult History Test
Take the test and show off your score
Average Score: 9
100% knows the answer to this question:
"Tony Blair is best known for holding what political position?
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Very Hard History Quiz
Only people with an IQ of 140+ will score a 10
Average Score: 8
99% knows the answer to this question:
"What is a depository containing historical records and documents?
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Geography Quizzes
Challenging Geography Quiz
We hope you can handle this quiz!
Average Score: 9
99% knows the answer to this question:
"What type of vacations do people often take in cold, mountainous Switzerland?
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Challenging Geography Quiz
We hope you can handle this quiz!
Average Score: 8
100% knows the answer to this question:
"Which continent has the fewest countries?
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Geography Quiz
10 questions most people will struggle with
Average Score: 7
93% knows the answer to this question:
"Which best describes the Wailing Wall?
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10 Geography Questions
Where did you go?
Average Score: 9
100% knows the answer to this question:
"In which country would tourists visit Ayers Rock?
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Hard Geography Quiz
You won't score a 5 or higher!
Average Score: 6
95% knows the answer to this question:
"Which city in Lombardy is the second largest city in Italy?
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HARD Geography Quiz
This really is a hard one!
Average Score: 6
100% knows the answer to this question:
"Malta achieved independence from which European country in 1964?
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Geology Quiz - How Much Do You Know?
Test Your Knowledge and See if You're Up to the Challenge
Average Score: 9
98% knows the answer to this question:
"On which body of water will surfers at Newquay catch the wave?
"
Are you smarter than this geographer?
Geography Quiz
Average Score: 8
99% knows the answer to this question:
"Which city is a key town for the Muslim, Jewish and Christian faiths?
"
Challenging Geography Quiz
We hope you can handle this quiz!
Average Score: 8
98% knows the answer to this question:
"Which continent has the fewest countries?
"
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Music Quizzes
10 famous songs, 10 unfinished titles
Take Quiz
Average Score: 8
100% knows the answer to this question:
"'Viva ____'
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New Music Trivia
Can you answer all music questions correctly?
Average Score: 9
100% knows the answer to this question:
"Which of these is the name of a '60s song by Bob Dylan?
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Music Quiz
Can you do better than a 5 out of 10?
Average Score: 9
100% knows the answer to this question:
"In what song does Dolly Parton sing: "What a way to make a livin' - Barely gettin' by - Its all takin' - And no givin"?
"
HARD Music Quiz
Let us know your score in the comments below
Average Score: 7
89% knows the answer to this question:
"Who wrote the opening to "California Girls" the first time he took acid?
"
Very Hard Music Quiz
10 Questions
Average Score: 6
100% knows the answer to this question:
"What classic song contains the lyrics "And the forests will echo with laughter.."?
"
Escape from reality and play this hard music quiz
Start Here
Average Score: 7
93% knows the answer to this question:
"Paul Westerberg was the front man for which band originally named The Impediments?
"
Think you know your Beatles from your Stones?
Can you beat your friends' scores?
Average Score: 8
100% knows the answer to this question:
"Which band's drummer had the nickname "Ringo"?
"
Music Quiz
Can you do better than a 5 out of 10?
Average Score: 7
100% knows the answer to this question:
"What is a group of four performers called?
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Music Quiz
Have you ever been to a concert?
Average Score: 9
99% knows the answer to this question:
"Davy Jones was the lead singer in which band?
"
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Science Quizzes
Can you score a perfect 10 in this Science quiz?
10 questions
Average Score: 9
100% knows the answer to this question:
"What is removed during an appendectomy?
"
Don't bother beating my score
Science Quiz
Average Score: 7
84% knows the answer to this question:
"What do we call the teeth we grind our food with?
"
Challenging Science Quiz
We hope you're smart enough for this quiz!
Average Score: 8
100% knows the answer to this question:
"Which of the following is a signal that you are hungry?
"
Nobody can score a perfect 10
Quiz for Scientists
Average Score: 10
100% knows the answer to this question:
"Just below the epiglottis are two plates called the thyroid cartilage, which in turn meet to produce what body part with a fruity name?
"
Science Quiz
Prove you're a real scientist by scoring a 10
Average Score: 9
99% knows the answer to this question:
"Torald Sollmann tried to find an antidote to what horrific gas ... by spraying himself with it?
"
Hard Science Quiz
Tell us if you scored an impossible 10
Average Score: 8
100% knows the answer to this question:
"The word "lunar" means something related to what?
"
Science Quiz
A score higher than a 6 is impossible
Average Score: 10
100% knows the answer to this question:
"Horseshoes are usually made from what?
"
Hard Science Quiz
We think this quiz is way too hard for you!
Average Score: 8
100% knows the answer to this question:
"Earthquakes sometimes cause "tidal" what?
"
HARD Science Quiz
Who can beat the average score?
Average Score: 8
100% knows the answer to this question:
"What is a change in the form of a species over time called?
"
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Who Sang Quizzes
Do You Know Who Sang These Songs?
Try scoring a 6+
Average Score: 8
100% knows the answer to this question:
"Who sang the famous song "Pinball Wizard" (1969)?
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Who sang these songs?
10 song questions
Average Score: 9
100% knows the answer to this question:
"Who sang the famous song "Take A Chance On Me" (1977) ?
"
Who Sang These Songs From The 70s?
10 hard questions
Average Score: 8
98% knows the answer to this question:
"Who sang the famous song "Fernando" (1975) ?
"
Who Sang These Songs?
Try scoring at least a 7. It's very hard!
Average Score: 10
100% knows the answer to this question:
"Who sang the famous song "Hey Jude" (1968) ?
"
60's music quiz
You won't score a perfect 10
Average Score: 8
97% knows the answer to this question:
"Who sang the famous song "Sunny Afternoon" (1966) ?
"
Who Sang These Songs
Did you know more than 5 songs?
Average Score: 9
100% knows the answer to this question:
"Who sang the famous song "You Make Me Feel Like A Natural Woman" (1967) ?
"
Who Sang These Songs?
No one knows more than 5 songs in this quiz!
Average Score: 8
93% knows the answer to this question:
"Who sang the famous song "Graceland" (1986)?
"
Who Sang These Famous Classic Rock Songs?
What's your favorite classic rock hit? Let us know in the comments!
Average Score: 8
100% knows the answer to this question:
"Who sang the famous song "(I Can't Get No) Satisfaction" (1965)?
"
Who Sang These Disco Songs
How many disco songs did you know?
Average Score: 8
99% knows the answer to this question:
"Who sang the famous song "Y.M.C.A." (1978)?
"
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Food & Beverage Quizzes
Food Quiz
What is your favorite food?
Average Score: 7
99% knows the answer to this question:
"On what holiday do children traditionally dress in costumes and walk door-to-door to gather candy?
"
Food Quiz
10 questions but you won't get them all correctly!
Average Score: 10
100% knows the answer to this question:
"Grapes come in what?
"
Food Quiz
What's on your favorite sandwich?
Average Score: 10
99% knows the answer to this question:
"What dish did Lemuel Benedict invent in 1894, as a hangover cure?
"
Test Your Culinary Knowledge with this Delicious Quiz
Show Off your result in the comments
Average Score: 10
100% knows the answer to this question:
"A cucumber preserved in vinegar or salt is called what?
"
Food & Beverages Quiz
Did you top a 6? Please tell us!
Average Score: 8
100% knows the answer to this question:
"Where would you find mussels?
"
Food and Beverage Quiz
10 questions but you won't get them all correctly!
Average Score: 9
100% knows the answer to this question:
"By what name is Beijing kao ya better known in the West?
"
Food and Beverage Quiz
Who is able to score higher than a lousy 4? Share if you did
Average Score: 9
100% knows the answer to this question:
"Which animal's meat is referred to as mutton, particularly when the animal is an adult?
"
Can you solve this Food Riddle?
Food Quiz
Average Score: 6
100% knows the answer to this question:
"Which type of beverage typically contains fruit?
"
Food and Beverage Quiz
10 questions but you won't get them all correctly!
Average Score: 9
100% knows the answer to this question:
"What second largest island in the Mediterranean are canned herrings named for?
"
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General Knowledge Quizzes
We challenge you to score an 8+
Challenging Knowledge Quiz
Average Score: 9
99% knows the answer to this question:
"When is Independence Day in USA?
"
Daunting Knowledge Quiz
We hope you are smart enough!
Average Score: 7
98% knows the answer to this question:
"The Sears Tower and the Aon Center are tall buildings in which US city?
"
Please be smarter than this man
10 Challenging Knowledge Questions
Average Score: 7
100% knows the answer to this question:
"How many people were "Dirty" in the title of a 1967 Lee Marvin movie?
"
Impossible Quiz
Only a few aced it
Average Score: 8
98% knows the answer to this question:
"Which 50s star was born as Doris Mary Ann Kappelhoff?
"
Brain Exercise Quiz
Start training your brain
Average Score: 9
98% knows the answer to this question:
"Which word means to form a mental picture of something?
"
Challenging Knowledge Quiz
Show off your score in the comments
Average Score: 7
97% knows the answer to this question:
"Which of these famous landmarks is in Europe?
"
We challenge you to score a 7+
Challenging Knowledge Quiz
Average Score: 8
96% knows the answer to this question:
"A girl cycled 23km before lunch and 46km after lunch. What was the total distance travelled?
"
Are you the quizzer we are looking for?
Take This Knowledge Test
Average Score: 8
100% knows the answer to this question:
"Who was prime minister of Britain through most of World War II?
"
Challenging Knowledge Quiz
We hope you're smarter than a 6/10
Average Score: 8
97% knows the answer to this question:
"What are the claws of a bird of prey called?
"
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Literature Quizzes
Literature Quiz
We challenge you to score an 8+
Average Score: 7
99% knows the answer to this question:
"Which one of these means an animal's poisonous fluids?
"
Literature Quiz
Who is your favorite author?
Average Score: 8
99% knows the answer to this question:
"In "Robinson Crusoe", where is Robinson Crusoe stranded?
"
Literature Quiz
How much knowledge have you stored in your brain about Literature?
Average Score: 6
84% knows the answer to this question:
"Which king said "A horse, a horse! my kingdom for a horse!"?
"
Literature Quiz
Who of our quizzers can get a perfect 10? Share below!
Average Score: 8
100% knows the answer to this question:
"What classic novel did D. H. Lawrence write in 1928?
"
Literature Quiz
How much knowledge have you stored in you brain about Literature?
Average Score: 7
96% knows the answer to this question:
"What word means to award compensation to?
"
Literature Test
What did you score? Share below if you dare!
Average Score: 8
100% knows the answer to this question:
"Who wrote the comedy "Midsummer Night's Dream"?
"
Tell us, what do you really know about literature?
We think not enough to get more than 4 answer correctly!
Average Score: 6
100% knows the answer to this question:
"What John Spyri story is about a girl who lives in the Alps?
"
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Movie Quizzes
Movie Quiz Challenge
Think you have what it takes to do better than me?
Average Score: 8
99% knows the answer to this question:
"What type of film is "Kung Fu Panda 2"?
"
Crazy Quiz About Movies!
Nobody will be able to score a 7+
Average Score: 9
100% knows the answer to this question:
"Finish this famous movie title, "All About ___ ".
"
10 Hard Movie Questions
What is the last movie you have seen?
Average Score: 7
98% knows the answer to this question:
"Which film star is married to Goldie Hawn?
"
Quiz About Movies
What did you score?
Average Score: 8
100% knows the answer to this question:
"What movie sequel promoted itself with the tagline, "Just when you thought it was safe to go back in the water"?
"
10 Questions about popular movies
Start Movie Quiz
Average Score: 8
100% knows the answer to this question:
"In which film did Robin Williams dress up as a Scottish nanny?
"
It's highly doubtful you can complete even half of these movie titles in this quiz.
Movie Quiz
Average Score: 9
100% knows the answer to this question:
"One Flew Over the Cuckoo's "..." (1975)
"
Movie Quiz
Click to start this quiz
Average Score: 7
99% knows the answer to this question:
"How would you categorise the film The Texas Chainsaw Massacre?
"
Movie Quiz
Can you score perfect 10?
Average Score: 6
100% knows the answer to this question:
"What is Whoopi Goldberg's character doing for a living before posing as a nun after witnessing a mob killing?
"
Movies: 10 Daunting Questions
We hope you have watched enough movies
Average Score: 9
100% knows the answer to this question:
"The film "Jack the Giant Slayer" is a retelling of what tale?
"
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Math Quizzes
Math Quiz
Only those who are good with numbers stand a change!
Average Score: 8
95% knows the answer to this question:
"How many feet long is a 100-yard football field?
"
Mathematics Quiz
Nobody is able to score a perfect 10
Average Score: 9
99% knows the answer to this question:
"How many in a pair?
"
Math Quiz
Only those who are good with numbers stand a chance!
Average Score: 10
100% knows the answer to this question:
"Which number is most commonly considered unlucky?
"
Math Quiz
Absolutely no one scores higher than a 5
Average Score: 8
100% knows the answer to this question:
"What is an estimate?
"
Math Quiz
Only those who are good with numbers stand a change!
Average Score: 19
100% knows the answer to this question:
"What number comes next in the sequence 8, 16, 32, 64?
"
Nobody will score higher than a 4
Because nobody is as smart as Einstein!
Average Score: 6
85% knows the answer to this question:
"What is a polynomial with two terms called?
"
Math Quiz
Only those who are good with numbers stand a change!
Average Score: 8
99% knows the answer to this question:
"What is the total of 25 + 53 + 32?
"
Unbeatable Math Quiz
You won't score higher than a 6
Average Score: 8
99% knows the answer to this question:
"Doubling is the same as multiplying by which number?
"
Math Quiz
Only those who are good with numbers stand a change!
Average Score: 9
100% knows the answer to this question:
"What is 123 times 4?
"
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Very hard geography quiz, can you get more than 5 correct?
Can you beat the score of this nurse?
Try this Proverbs quiz and see if you can find the missing word!