Toggle Navigation
Games
Blog
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
Contact us
Help center
Sign in
Study
General knowledge
0
%
0
0
0
Back
Restart
What is the hardest natural substance on Earth?
Diamond
Oops!
Okay!
What is the powerhouse of the cell?
Mitochondria
Oops!
Okay!
What is the main language spoken in Iran?
Persian (Farsi)
Oops!
Okay!
Which famous scientist invented the light bulb (commercially successful version)?
Thomas Edison
Oops!
Okay!
What element is needed for iron to rust?
Oxygen (and water, but oxygen is essential)
Oops!
Okay!
Which singer became the youngest-ever solo artist to win Album of the Year at the Grammys?
Billie Eilish
Oops!
Okay!
How many strings does a standard guitar have?
6 (NOT 7!)
Oops!
Okay!
What is the capital city of South Korea?
Seoul
Oops!
Okay!
Which country invented paper?
China
Oops!
Okay!
What is the longest-running animated TV series in history?
The Simpsons
Oops!
Okay!
Who is the Greek god of the sea?
Poseidon
Oops!
Okay!
Which organ in the human body produces insulin?
Pancreas
Oops!
Okay!
Which natural disaster is measured with the Richter scale?
Earthquakes
Oops!
Okay!
Which country gifted the Statue of Liberty to the United States?
France
Oops!
Okay!
What is sushi traditionally wrapped in?
Seaweed (nori)
Oops!
Okay!
What is the longest bone in the human body?
Femur
Oops!
Okay!
How many time zones are there in Russia?
11
Oops!
Okay!
Who wrote Hamlet?
Shakespeare
Oops!
Okay!
What is the largest mammal in the world?
Blue whale
Oops!
Okay!
What is the main ingredient in traditional guacamole?
Avocado
Oops!
Okay!
Which country drinks the most coffee per capita?
Finland
Oops!
Okay!
What is the largest planet in our solar system?
Jupiter
Oops!
Okay!
What is the largest desert in the world (by area)?
Antarctic Desert
Oops!
Okay!
What is the boiling point of water in Celsius?
100°C
Oops!
Okay!
Zendaya stars in HBO’s series Euphoria. What is her character’s name?
Rue Bennett
Oops!
Okay!
Which US state is known as “The Sunshine State”?
Florida
Oops!
Okay!
Which blood type is known as the universal donor?
O negative
Oops!
Okay!
Who wrote the novel 1984?
George Orwell
Oops!
Okay!
Which actor played Iron Man in the Marvel Cinematic Universe?
Robert Downey Jr.
Oops!
Okay!
What is the chemical symbol for potassium?
K
Oops!
Okay!
What year did the Berlin Wall fall?
1989
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies