## Numbers from one to thirty-one ... a page for each day of the month

... and for similar facts about other numbers see Numbers: Facts, Figures & Fiction.

# 18

= 2 x 3 x 3

= 2 x 9
= 3 x 6

= 3 + 4 + 5 + 6

1, 3, 4, 7, 11, 18, 29...
A Lucas number.

Australian rules football is played with teams of 18 players.

There are 18 holes on many golf courses.

18deg. Celsius is usually considered a comfortable room temperature.

The two 18 letter words `conservationalists' and `conversationalists' are anagrams of each other. They are the longest pair of anagrams in the English language if scientific words are excluded.

Eighteenmo is the size of a piece of paper which has been made by cutting a larger sheet of paper into 18 equal pieces. It is also the name for a size of book that has been made in the same way.

In the UK, the names of race horses can be no longer than 18 characters, including spaces.

6 circles, 12 circles, 18 stars - number patterns on a drain cover.

Under British law, when you reach the age of 18 -

• you reach the age of majority; you are an adult in the eyes of the law,
• you can vote in general and local elections,
• you can serve on a jury,
• you can buy and drink alcohol in a bar,
• you can open a bank account or Post Office Girobank account without a parent's signature.

18 equilateral triangles make a hexagon ring.

Updated 28 November 2003