How many seconds are in one hour?
How many keys are on a standard modern piano?
In what year were euro banknotes and coins first introduced as cash?
In what year was the United States Constitution signed?
What is the height of Mount Everest in metres according to the 2020 China-Nepal survey, rounded to the nearest metre?
In what year did the Ethereum mainnet launch?
In what year did Nelson Mandela become President of South Africa?
What is the exact speed of light in a vacuum, in metres per second, as defined in the SI?
In what year was the Soviet Union dissolved?
What is the atomic number of gold?
How many minutes are in one day?
How many planets are in the Solar System under the IAU's 2006 definition?
In what year was the United States Declaration of Independence adopted?
In what year was the Bastille stormed, beginning the French Revolution?
In what year did World War II end?
In what year did Christopher Columbus first reach the Americas?
In what year did the Berlin Wall fall?
How many Super Bowls did Tom Brady win as a player?
In what year did Jackie Robinson make his Major League Baseball debut?
How many men's professional major championships did Jack Nicklaus win?
How many career regular-season home runs did Barry Bonds hit in Major League Baseball?
In what year was the first FIFA men's World Cup played?
How many Grand Slam singles titles did Serena Williams win in her career?
How many Grand Slam men's singles titles did Roger Federer win in his career?