Maths facts 

1.T word googol was made up by a 9-year old boy

In the 1930s an American Mathematician named Edward Kasner asked his nine-year old nephew Milton Sirotta to make up a word for him to use. Milton made up the world ‘googol’ which Edward Kasner later used to describe the number  .  The search engine Google was later named after the ‘googol’ meaning that Milton Sirotta had unwittingly helped name one of the world’s most famous companies.

2.There are only 17 possible types of wallpaper pattern

If you look at the underlying symmetry in a wallpaper pattern then mathematicians have shown that there are only 17 possibilities.  You can of course vary the colours and decoration, but you will still only be left with 17 different possible symmetries.