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Which gas do plants absorb from the air for photosynthesis?
How many sides does a hexagon have?
How many planets are in the Solar System?
What is the capital city of Morocco?
How many degrees are in a right angle?
Who was the first woman to win a Nobel Prize?
What is the capital city of Vietnam?
Which organ pumps blood through the human body?
Which country won the FIFA World Cup in 1998?
Which city hosted the Summer Olympic Games held in 2012?
In what year did the French Revolution begin?
What is the square root of 144?
What is the speed of light in a vacuum, in kilometres per second, rounded to the nearest thousand?
Which is the highest mountain on Earth above sea level?
What is the capital city of Kazakhstan?
What is the capital city of New Zealand?
What is the capital city of Australia?
Which South Korean artist performs 'Gangnam Style', the first YouTube video to reach one billion views?
The phrase 'the cake is a lie' originates from which video game?
In what year did Wikipedia launch?
In what year did LIGO announce the first direct detection of gravitational waves?
How many protons does a helium nucleus have?
In what year were the Nobel Prizes first awarded?
What is the speed of light in vacuum, in meters per second, as defined exactly by the SI?
How many chromosomes does a typical human somatic cell have?