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Question 1 of 10

A Chinese eunuch named Cai Lun (or Ts'ai Lun) is credited with using bark, hemp, rags and fishnets to invent something in 105 AD. What?

Question 2 of 10

Named for Friedrich Mohs and determined with a sclerometer, what does the Mohs scale measure?

Question 3 of 10

Chromium was named because it's so colorful, and chlorine was named because it is often one particular color. Which one?

Question 4 of 10

Sputnik 2 took Laika into space. What kind of animal was Laika?

Question 5 of 10

What do gluons "glue" together within hadrons, like protons and neutrons?

Question 6 of 10

What hirsute part of the body interests somebody who studies pogonology?

Question 7 of 10

Which of these tiger subspecies is not either extinct already, or a few hundred wild animals away from extinction?

Question 8 of 10

With a name literally meaning "hollow cavity," what is the largest vein in your body?

Question 9 of 10

Which of these toolbox items operates on the wheel and axle principle?

Question 10 of 10

West Nile Fever, a mosquito-borne viral infection that can cause inflammation of the brain, was first isolated in the West Nile district of what country in 1937?

Who Sang Quizzes

Can you name these famous artists?

Show your music knowledge in the comments

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79% knows the answer to this question: "Who sang “Stayin’ Alive” (1977)? "
Music Quiz For Music Geniuses

Who Sang These Songs?

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62% knows the answer to this question: "Which Motown classic charmed audiences with "My Girl" (1964)? "
Who Sang These Songs?

Do you think you can name at least 5?

Average Score: 9

86% knows the answer to this question: "Who sang the famous song "Suspicious Minds" (1969) "
You Know The Songs...

but who sings it? Let us know how many you knew!

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59% knows the answer to this question: "Who sang the song, "Build Me Up Buttercup" (1968)? "
Who Sang These Songs?

How many artists did you know?

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21% knows the answer to this question: "Who originally rocked "Hound Dog" (1956)? "
Play Quiz

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35% knows the answer to this question: "Who sang the emotional ballad “Nothing Compares 2 U” (1990)? "

General Knowledge Quizzes

Can you name the artists?

We bet you can't name half of these!

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89% knows the answer to this question: " "
General Knowledge Quiz

What did you score?

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39% knows the answer to this question: " "
10 Trivia Questions For You

So... what did you score?

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27% knows the answer to this question: " "
15 Hard General Knowledge Questions

Find out if you have any brains

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26% knows the answer to this question: " "
Test Your General Knowledge

Play quiz to get the correct answer

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Knowledge Quiz Sudden Death

Are you smart enough to nail this one?

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32% knows the answer to this question: " "

Math Quizzes

No one can score a 7 or better

Math Test

Average Score: 9

41% knows the answer to this question: "Which is the largest number? "
Math Quiz

Can You Solve It Without a Calculator?

Average Score: 8

36% knows the answer to this question: "687+462+237 equals what number? "
Math Quiz

We hope you'll score higher than a 3+4

Average Score: 7

64% knows the answer to this question: "40x41÷40 equals what number? "
Can you solve this?

go to Math Quiz

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85% knows the answer to this question: "If a five day vacations costs 2500 dollars, how much does each day cost? "
Math Quiz

We challenge you to score an 8+

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41% knows the answer to this question: "What is twenty times twenty? "
Math Quiz

Absolutely no one scores higher than a 5

Average Score: 8

26% knows the answer to this question: "What is an estimate? "