An icosagon is a shape with 20 sides!

In a room of 23 people, there’s a 50 percent chance of two people having the same birthday!

The word 'hundred' comes from the old Norse term, 'hundrath', which actually means 120 and not 100!

From 0 to 1000, the only number that has the letter 'a' in it is 'one thousand'!

'Forty' is the only number that is spelt with letters arranged in alphabetical order!

Every odd number has an 'e' in it!

'Four' is the only number in the English language that is spelt with the same number of letters as the number itself!

Zero (0) is the only number which can not be represented by Roman numerals!