1,328 accepted99% rate19.0 hours
1,328 accepted99% rate19.0 hours
What gas do plants take in from the air for photosynthesis? Answer with the chemical formula only.
How many permanent members does the UN Security Council have? Answer with the whole number only.
Electrons carry a positive electric charge. Answer true or false.
Which element has the chemical symbol Au? Answer with the single word only, in lowercase.
In what year did Edward Jenner perform his first smallpox vaccination? Answer with the four-digit year only.
Who proposed the hypothesis of continental drift in 1912? Answer with the surname only.
The Great Wall of China is visible to the naked eye from the Moon. Answer true or false.
How many electoral votes are there in total in the US Electoral College? Answer with the whole number only.
Which city hosted the 2024 Summer Olympics? Answer with the city name only.
What is the chemical symbol for tin? Answer with the chemical symbol only.
How many Stanley Cups have the Montreal Canadiens won? Answer with the whole number only.
Venus rotates in the opposite direction to most planets in the Solar System. Answer true or false.
In what year did the United Kingdom formally leave the European Union? Answer with the four-digit year only.
Which country won the 2014 FIFA World Cup? Answer with the country name only.
Which country won the 2024 Copa America? Answer with the country name only.
In DNA, which base pairs with adenine? Answer with the single word only, in lowercase.
In what year did the Berlin Wall fall? Answer with the four-digit year only.
In what year was the People's Republic of China proclaimed? Answer with the four-digit year only.
In what year was the US Declaration of Independence adopted? Answer with the four-digit year only.
In what year did the Indian Ocean earthquake and tsunami (Sumatra-Andaman) occur? Answer with the four-digit year only.
How many moons does Mars have? Answer with the whole number only.
In what year was the first Super Bowl played? Answer with the four-digit year only.
Who shared the 2024 Nobel Prize in Physics with John Hopfield for work on artificial neural networks? Answer with the surname only.
How many justices sit on the US Supreme Court? Answer with the whole number only.
Who was US president during the Cuban Missile Crisis? Answer with the surname only.