How many centimeters are there in a meter?

What color do you get by mixing red and yellow?

What is the freezing point of water?

How many colors are there in a rainbow?

Which month has an extra day in a leap year?

Which country invented pizza?

What is the currency of Japan?

What do you call a person who studies rocks?

What is the name of our galaxy?

How many vowels are there in the English alphabet?