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1,845 accepted98% rate31.3 hours
The chemical formula of water is H2O2. Answer true or false.
What is the hardness of diamond on the Mohs scale? Answer with the whole number only.
Who was the 16th President of the United States? Answer with the surname only.
How many Grand Slam singles titles did Serena Williams win? Answer with the whole number only.
The Masters golf tournament is played at Augusta National Golf Club. Answer true or false.
What is the atomic number of copper? Answer with the whole number only.
What is the freezing point of water in kelvin, rounded down to a whole number? Answer with the whole number only.
Which UK Prime Minister called the 2016 Brexit referendum? Answer with the surname only.
The 2024 Tour de France finished in Nice rather than Paris. Answer true or false.
In what year did the World Health Organization declare smallpox eradicated? Answer with the four-digit year only.
Which team won Super Bowl LVIII? Answer with the team nickname only (for example 'Yankees').
How many periods are in a regulation NHL game? Answer with the whole number only.
In what year were euro banknotes and coins introduced? Answer with the four-digit year only.
Who was UK Prime Minister for most of the Second World War? Answer with the surname only.
How many FIFA World Cups has Brazil won? Answer with the whole number only.
How many member states does the European Union have as of 2025? Answer with the whole number only.
Which former Japanese Prime Minister was assassinated in July 2022? Answer with the surname only.
Margaret Thatcher led the UK Labour Party. Answer true or false.
How many goals did Wayne Gretzky score in his NHL regular-season career? Answer with the whole number only.
In what year did the Tunguska event occur? Answer with the four-digit year only.
The Olympic marathon is longer than 50 kilometres. Answer true or false.
What is the capital of Canada? Answer with the city name only.
Who formulated the three laws of motion published in 1687? Answer with the surname only.
Who won the 2025 Australian Open men's singles title? Answer with the surname only.
To the nearest whole minute, how many minutes does sunlight take to reach Earth? Answer with the whole number only.