Numbers, numbers, numbers. They’re everywhere and make up so much of what we do each day, There are also plenty of interesting things we can learn about numbers, so we’ve picked out some of our favourite number facts below. Read on and learn something you might not have known before.
- Pi cannot be written as a fraction
Because of the nature of Pi, it is an irrational number and therefore cannot be written as a fraction. As it doesn’t repeat itself and doesn’t end when written correctly, it is impossible to confine it to a fraction.
- No other prime numbers end in 2 and 5 except 2 and 5.
You can get prime numbers which end in any other number, but not those which end in a 2 or a 5 once you go past that original number,
- The equals sign (=)was invented by a Welshman
The mathematician and physicist Robert Recorde created the equals sign because he was fed up of writing ‘equals to’. He also introduced the plus sign to English speakers.
- Opposite sides of a die add up to 7
You may not know this but all opposite sides of a die add to 7 – try it yourself and find out.
- Ever wondered where the word ‘calculus’ comes from?
The famous Greek mathematician Pythagoreans used to use small rocks to represent numbers. The Greek word for pebbles is ‘calculus’ which is where the word comes from.
- Forty is the only number where all letters are in alphabetical order
‘One’ on the other hand is the only one where letters are in reverse order.
- What comes after a million, billion and trillion?
Quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion and undecillion.
- ‘Google’ comes from the world ‘googol’
It is actually the word for the number one followed by one hundred zeros, invented by 9-year-old Milton Sirotta, nephew of American mathematician Edward Kasner.
- You can cut a birthday cake into 8 pieces using 3 slices
Simply cut the cake in quarters using 2 of the slices, horizontally and vertically down the centre of the cake. Then, you can take all 4 pieces and arrange them in a stack that is 4 pieces high. Finally, you can just cut that stack of 4 pieces in half – using your third and final cut – and then you will end up with 8 pieces of cake! Sorry, this was cheating a little.
- The word ‘hundred’ is derived from the Norsk word ‘hundrath’
However, in Norsk, it actually means 120, not 100.
So there you have it! Numbers aren’t so boring after all! Enjoy sharing your cool new numbers trivia with others and dazzle them with your intelligence.