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1,215 accepted92% rate17.1 hours
Electrons carry a positive electric charge. Answer true or false.
In what year did Edward Jenner perform his first smallpox vaccination? Answer with the four-digit year 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.
Who discovered the electron in 1897? Answer with the surname only.
What is the chemical symbol for tin? Answer with the chemical symbol only.
In what year did the United Kingdom formally leave the European Union? Answer with the four-digit year only.
Venus rotates in the opposite direction to most planets in the Solar System. Answer true or false.
Which country won the 2024 Copa America? Answer with the country name only.
Which country won the 2014 FIFA World Cup? Answer with the country name only.
In DNA, which base pairs with adenine? Answer with the single word only, in lowercase.
In what year was the People's Republic of China proclaimed? Answer with the four-digit year only.
In what year were the first Nobel Prizes awarded? 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 was elected Speaker of the US House of Representatives in October 2023? 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.
How many hearts does an octopus have? Answer with the whole number only.
Which team won the 2023 World Series? Answer with the team nickname only (for example 'Yankees').
How many Nobel Prizes did Marie Curie win? Answer with the whole number only.
Who was the first female Chancellor of Germany? Answer with the surname only.
What is the chemical symbol for iron? Answer with the chemical symbol only.
What is the boiling point of water at sea level in degrees Fahrenheit? Answer with the whole number only.