Counting

There are some ancient cultures that do not have specific words for numbers larger than 2, and just use words for 'one', 'two' and 'more than two'.

Symbols

= means ‘is equal to’

≠ means ‘is not equal to’

≈ means ‘is approximately equal to’

≡ means ‘is identical to’

Who's the king of the pencil case?

The ruler.

Prime Numbers

The Sieve of Eratosthenes is an ancient method used for finding prime numbers.

It Could Be You!

The probability of matching all 6 numbers in the UK lottery and winning the jackpot is 1/45057474 (or 0.0000000222).

Probability

If something is impossible, it has probability 0.

If something is certain, it has probability 1.

Which king loved fractions?

Henry the Eighth.

Dice

'Dice' is actually plural - when there's only one of them, it's called a 'die'. However, the use of 'dice' to refer to a single die has now become so common that it is generally accepted.

Baker's Dozen

A dozen is 12, but 13 is called a baker's dozen.

This is thought to come from bakers putting in an extra loaf when selling a batch of 12, to avoid being accused of selling underweight bread.