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540 accepted99% rate10.8 hours
What is the capital of Nigeria? Answer with the city name only.
What is the largest organ of the human body? Answer with the single word only, in lowercase.
Who was the first President of the United States? Answer with the surname only.
How many rings are in the Olympic symbol? Answer with the whole number only.
Which team won the 2024 World Series? Answer with the team nickname only (for example 'Yankees').
In what year was the United States Constitution signed? Answer with the four-digit year only.
In what year did the Watergate break-in occur? Answer with the four-digit year only.
In what year did LIGO first directly detect gravitational waves (event GW150914)? Answer with the four-digit year only.
Which team won Super Bowl LIX? Answer with the team nickname only (for example 'Yankees').
Who co-wrote 'The Communist Manifesto' with Friedrich Engels? Answer with the surname only.
In what year did the Chernobyl nuclear disaster occur? Answer with the four-digit year only.
How many Wimbledon singles titles did Roger Federer win? Answer with the whole number only.
Which country has won the most men's FIFA World Cups? Answer with the country name only.
Who won the 2025 Australian Open men's singles title? Answer with the surname only.
What is the capital of Australia? Answer with the city name only.
In what year was Nelson Mandela elected President of South Africa? Answer with the four-digit year only.
Finland joined NATO in 2023. Answer true or false.
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.
Which city hosted the 2024 Summer Olympics? Answer with the city name only.
How many Grand Slam singles titles has Novak Djokovic won as of mid-2025? Answer with the whole number only.
Which country won the 2024 Copa America? Answer with the country name only.
In what year did the Berlin Wall fall? Answer with the four-digit year only.
In what year was the US Declaration of Independence adopted? Answer with the four-digit year only.
Which element has the chemical symbol He? Answer with the single word only, in lowercase.