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?
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?
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 Knowledge Quiz
What did you score? Please let everyone know in the comments
Average Score: 8
100% knows the answer to this question:
"How old was Ronald Reagan when he died on June 5, 2004?
"
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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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Test your History skills
Let us know how you did in the comments
Average Score: 7
98% knows the answer to this question:
"In 1966, French and British media falsely report the death of what famous person?
"
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History Quiz
Good luck scoring a 10/10
Average Score: 7
98% knows the answer to this question:
"Where were German Zeppelins found?
"
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History Trivia Quiz
Are you smart enough to this quiz?
Average Score: 7
100% knows the answer to this question:
"What was Thomas Fairfax's main reason for resigning from the English army?
"
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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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History Trivia Quiz
10 history questions to train your brain
Average Score: 8
100% knows the answer to this question:
"Which ancient kingdom was ruled by the Pharaohs?
"
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Quiz About History
We bet you can't even score a simple 5
Average Score: 7
93% knows the answer to this question:
"In February 1950, the secret Police known as the "Stasi" was founded in which country?
"
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Challenging Quiz About History
Are you smart enough for this quiz?
Average Score: 8
100% knows the answer to this question:
"Which of these is actually a famous battle in history?
"
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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
Who dares to share his score in the comments?
Average Score: 9
100% knows the answer to this question:
"France shares a border to the south with which European Country?
"
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Quiz on Geography
Good luck making this fun quiz!
Average Score: 9
100% knows the answer to this question:
"In what city would you find Hyde Park, as well as Piccadilly, Trafalgar and Belgrave squares?
"
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Play This Geography Quiz Now!
It's going to be impossible to score a 6+
Average Score: 6
100% knows the answer to this question:
"Which country lies directly south of Mongolia?
"
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Hard Geography Quiz
You won't score a 6 or higher!
Average Score: 9
100% knows the answer to this question:
"Which part of the UK has the largest population?
"
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Geography Knowledge Trivia Quiz
Not a single soul will score a 10
Average Score: 8
96% knows the answer to this question:
"The river Nile is located on which continent?
"
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Challenging Geography Quiz
We hope you can handle this quiz!
Average Score: 8
100% knows the answer to this question:
"Dortmund and Frankfurt are major cities in which European country?
"
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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
99% knows the answer to this question:
"On which body of water will surfers at Newquay catch the wave?
"
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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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Music Quiz For Intelligent People
Are you smart enough?
Average Score: 7
100% knows the answer to this question:
"After a brief mid-career effort to play for the Detroit Lions, who included two of the Lions (Mel Farr and Lem Barney) portraying party-goers in the background of "What's Going On"?
"
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How often do you listen to music?
HARD Music Quiz
Average Score: 7
100% knows the answer to this question:
"Coolio reworked Stevie Wonder's "Pasttime Paradise," turning it into what song?
"
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Challenging Music Quiz.
We are sorry for these difficult questions!
Average Score: 9
100% knows the answer to this question:
"Which is the song from the movie "Top Gun" that was a hit for Berlin in 1986?
"
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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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Challenging Music Quiz
We challenge you to do better than a 5 out of 10
Average Score: 8
99% knows the answer to this question:
"Who "stuck a feather in his hat and called it macaroni"?
"
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Quiz about Music
Only real music fans score a decent 7+
Average Score: 9
100% knows the answer to this question:
"Which of these was a hit single for The Mamas & the Papas in 1966?
"
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Music Quiz
How often do you listen to music?
Average Score: 8
100% knows the answer to this question:
"Which of these groups would you most associate with Diana Ross?
"
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Music Quiz
Please share your score in the comments below
Average Score: 8
100% knows the answer to this question:
"Mick Jagger is the lead singer of which rock group?
"
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Music Quiz
Can you do better than her 5 out of 10?
Average Score: 9
99% knows the answer to this question:
"According to grammar expert Irving Fisher what song's title would have been correct if it had been in response to the question, "Have you no bananas?"
"
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Nobody can score higher than a lousy 5
Science Quiz
Average Score: 7
88% knows the answer to this question:
"What do we call the teeth we grind our food with?
"
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Science Quiz
Try scoring a perfect 10
Average Score: 10
100% knows the answer to this question:
"Poodle, collie, beagle and golden retriever are all types of what animal?
"
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Quiz For Scientists
Have you ever entered a science fair?
Average Score: 9
100% knows the answer to this question:
"Alexander Graham Bell and his assistant were the first two people to use this invention, but First Lady Lucy Hayes was the third. What?
"
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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?
"
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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?
"
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Show us your score and you get mad respect
Hard Science Quiz
Average Score: 9
98% knows the answer to this question:
"A 'tracheotomy' is performed when what is blocked?
"
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Mad Science Quiz
Can you do better than a 7?
Average Score: 8
100% knows the answer to this question:
"When you shuffle along carpets on dry days, the friction builds up your negative charge, which is attracted to the positive charge on a doorknob. What does that produce?
"
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Try scoring a 10 out of 10
10 HARD Science Questions
Average Score: 7
100% knows the answer to this question:
"John Luther Jones of Cayce, Kentucky, has a special place in railway lore. By what name is he better known?
"
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Play This Science Quiz
Only for quizzers with an high IQ
Average Score: 9
100% knows the answer to this question:
"Most of the oxygen in the air is produced by what chemical process?
"
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Who Sang These Songs?
How many songs did you know?
Average Score: 6
100% knows the answer to this question:
"Who sang the famous song "Just Can't Get Enough (live)" (1985)
"
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Can you score a 6 or better ?
Do you remember who sang this song?
Average Score: 9
100% knows the answer to this question:
"Who sang the famous song "Thriller" (1983)
"
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Who sang these songs?
10 questions about music
Average Score: 6
100% knows the answer to this question:
"Who sang the famous song "Djangology" (1949)?
"
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60's music quiz
You won't score a perfect 10
Average Score: 8
100% knows the answer to this question:
"Who sang the famous song "Sunny Afternoon" (1966) ?
"
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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) ?
"
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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) ?
"
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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) ?
"
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Who Sang These Songs?
Nobody knows more than 4 songs
Average Score: 7
88% knows the answer to this question:
"Who sang the famous song "Rock With You" (1979)?
"
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Who Sang These Songs?
You will not score higher than a 4
Average Score: 7
100% knows the answer to this question:
"Who sang the song, "Gangnam Style"?
"
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Challenging Food & Beverages Quiz
We challenge you to beat his score!
Average Score: 8
100% knows the answer to this question:
"Pop tarts can be heated in which of the following?
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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?
"
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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?
"
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Challenging Food Quiz
10 HARD questions about food & beverages
Average Score: 6
100% knows the answer to this question:
"if you order Chateaubriand, what type of meat will you be served?
"
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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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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?
"
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Challenging Food Quiz
We bet you're not a true chef!
Average Score: 9
98% knows the answer to this question:
"Known for its sweet, deep-red flesh, what orange mutation probably first appeared in 17th century Sicily?
"
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Unknown Fruit Quiz
No one scores a 6 or more in this unknown fruit quiz!
Average Score: 7
100% knows the answer to this question:
"What is the name of this unknown fruit?
"
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10 fun questions about food you probably can't answer
Food Quiz
Average Score: 9
100% knows the answer to this question:
"What food group do oatmeal, brown rice and whole wheat belong to?
"
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Impossible Mixed Trivia Quiz
Can you do better than a 6? Prove in the comments!
Average Score: 7
100% knows the answer to this question:
"350x15+351 equals what number?
"
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Play QuizTest Your Knowledge with This Quiz
Can You Answer the Tough Questions 4 and 9?
Average Score: 8
92% knows the answer to this question:
"Which human organ transplant is performed for the first time in November of 1968?
"
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Quiz on General Knowledge
Questions 6 and 8 seem impossible to answer
Average Score: 9
100% knows the answer to this question:
"What was the maiden name of Princess Diana?
"
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Scoring a 5 or higher is almost impossible
Play this quiz
Average Score: 7
100% knows the answer to this question:
"B is half of A and C is a quarter of B. If A is 40 what is C?
"
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Brain Workout
Are you up for it?
Average Score: 6
90% knows the answer to this question:
"What central London street is famous for containing the main government offices?
"
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You absolutely won't score higher than a 4!
Impossible Trivia Quiz
Average Score: 8
99% knows the answer to this question:
"Matthew Broderick provided the voice of Simba in what Disney film?
"
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Mixed Trivia Quiz
We challenge you to score a 7 or higher
Average Score: 8
95% knows the answer to this question:
"Bordeaux is often called the "Wine Capital of the World". In what country is it located?
"
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Mixed Trivia Quiz
If you can score a 10 you are smarter than most people!
Average Score: 6
100% knows the answer to this question:
"250x5+251 equals what number?
"
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A Quiz on Everything and Anything
Who can score a perfect 10?
Average Score: 8
95% knows the answer to this question:
"2175+1454+733 equals what number?
"
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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?
"
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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?
"
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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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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?
"
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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"?
"
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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?
"
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Movie Quiz
What is the last movie you have seen?
Average Score: 8
97% knows the answer to this question:
"Which of these actresses is regarded as a sex symbol of the 1960s?
"
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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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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?
"
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Movie Quiz
What movie has your best memory?
Average Score: 8
100% knows the answer to this question:
"You call that a knife? What movie, starring Paul Hogan, got men bragging about the size of their knives?
"
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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)
"
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We bet you can't even finish half of these movie titles in this quiz
Movie Quiz
Average Score: 9
100% knows the answer to this question:
" The Lord of the "...." (2003)
"
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Only 10% can complete all 10 of these movie titles
Movie Title Quiz
Average Score: 10
100% knows the answer to this question:
"Planet of the …..
"
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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?
"
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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?
"
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Math Quiz
Absolutely no one scores higher than a 5
Average Score: 8
100% knows the answer to this question:
"What is an estimate?
"
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Test Your Math Knowledge
Absolutely nobody scores a solid 10
Average Score: 9
98% knows the answer to this question:
"What number when added to 1661, gives 2723?
"
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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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Mathematics Quiz
Do you know the answer?
Average Score: 9
98% knows the answer to this question:
"How many CD racks does it take to hold 300 CDs if each rack holds 75 CDs?
"
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No one can score a 7 or better
Math Test
Average Score: 9
97% knows the answer to this question:
"Which is the largest number?
"
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SUDDEN DEATH QUIZ
Try to stay on your feet!
Average Score: 0
0% knows the answer to this question:
"How fast do you need to travel to go 150 miles in 3 hours?
"
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Math Quiz Time!
Think you have what it takes to ace it?
Average Score: 9
100% knows the answer to this question:
"If you are 29 years old. How old will you be in 21 years time?
"
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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?
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