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Try not to cry when you do this impossible Science quiz!

Question 1 of 10

In 1962, Yukio Horie invented the first practical fiber-tip pen to accommodate which country's system of writing?

Question 2 of 10

As cities get crowded with phones, they can shoehorn in new overlay area codes. The first one, in 1992, was 917. Where?

Question 3 of 10

Named for a North African coast, what now extinct sub-species of lion was used in the Roman arena?

Question 4 of 10

Most large freshwater lakes are in the rift valleys between tectonic plates. Which one is in the Great Rift Valley?

Question 5 of 10

Superconductors lose their electrical resistance. How do you get them to do this?

Question 6 of 10

When really big stars die, they blow up as a supernova, spreading debris all over the place. What does this debris become?

Question 7 of 10

How many sides does a dodecagon have?

Question 8 of 10

What percentage of acetic acid is legally allowed in vinegar?

Question 9 of 10

What are organic compounds in which some of the bonding elements are delocalized?

Question 10 of 10

What Central American bird (and national symbol) has a tail so long that the only safe way it can fly off a branch is by jumping backward first?

Who Sang Quizzes

Do You Know Who Sang These Songs?

We challenge you to score at least a 7!

Average Score: 9

42% knows the answer to this question: "Who sang the famous song, "Bridge Over Troubled Water" (1970)? "
Music Quiz For Music Geniuses

Who Sang These Songs?

Average Score: 7

58% knows the answer to this question: "Which Italian tenor soared with "Volare" (1958)? "
Motown Legends: Can You Name the Artist Behind These Hits?

Can you match the song to the Motown legend?

Average Score: 7

80% knows the answer to this question: "Who sang the song, "Tracks of My Tears" (1965)? "
Songs from the 60s!

Do you know who sang them?

Average Score: 8

74% knows the answer to this question: "Who sang the famous song "I Saw Her Standing There" (1963) "
Who Sang These Songs?

Did you know more than 7? You're awesome!

Average Score: 9

25% knows the answer to this question: "Who sang the famous song "La Bamba" (1958)? "
Can you identify the singer of these songs?

How many songs didn't you know?

Average Score: 7

85% knows the answer to this question: "Who made “Free Fallin’” a hit in 1989? "

General Knowledge Quizzes

Trivia Contest

Will you succeed?

Average Score: 6

50% knows the answer to this question: " "
Sudden Death Quiz

How many chances did you need?

Average Score: 0

58% knows the answer to this question: " "
Play Quiz

Sudden Death Trivia Quiz

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76% knows the answer to this question: " "
Impossible Knowledge Quiz

Dare to share your score?

Average Score: 5

52% knows the answer to this question: " "
10 Impossible Trivia Questions

Let us know below what you did

Average Score: 5

43% knows the answer to this question: " "
Challenging Mixed Quiz

We are very sorry for this quiz

Average Score: 7

45% knows the answer to this question: " "

Math Quizzes

Math Quiz

Can you solve this?

Average Score: 7

97% knows the answer to this question: "789+530+271 equals what number? "
Math IQ Test

Do you know the answer?

Average Score: 8

52% knows the answer to this question: "If it snows 1 inch per hour for 2 days, how many inches of snow is that? "
Math Quiz

Please let us know your score below

Average Score: 9

69% knows the answer to this question: "What is 18 doubled? "
Can you solve this?

go to Math Quiz

Average Score: 9

57% knows the answer to this question: "If a five day vacations costs 2500 dollars, how much does each day cost? "
Nobody will score higher than a 4

Because nobody is as smart as Einstein!

Average Score: 6

55% 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

24% knows the answer to this question: "What is the total of 25 + 53 + 32? "

Extremely hard mixed knowledge quiz, how many did you answer correctly?
Everybody likes music, but how much do you know about it?
Literature Quiz