13 (number) facts for kids

Thirteen is a number that comes right after twelve and just before fourteen. It is an odd number, which means you can't divide it evenly by two. Thirteen is also a prime number, meaning its only whole number divisors are 1 and itself.

The Number 13 and Superstitions

Many people around the world think that thirteen is an unlucky number. This idea is a superstition, which is a belief that isn't based on facts or science. There's no real proof that the number thirteen brings bad luck.

Why Some People Think 13 is Unlucky

The idea of thirteen being unlucky has old roots. For example, in some buildings, especially tall ones, you might notice that they skip the 13th floor. Sometimes, this floor is used for building equipment instead of offices or apartments.

One reason for this superstition comes from Norse mythology. In one old story, there were 12 gods at a dinner party, and then a 13th, uninvited guest arrived, causing trouble. Another belief is that having thirteen people sitting at a table for a meal can bring bad luck. Also, in the tarot deck, the Death card is often numbered thirteen, which some people connect to misfortune.

Friday the 13th

The superstition about thirteen is often strongest when Friday falls on the 13th day of the month. This day is sometimes seen as extra unlucky by those who believe in the superstition.

Thirteen in Roman Numerals

In Roman numerals, which were used by the ancient Romans, the number 13 is written as XIII. The 'X' stands for ten, and 'III' stands for three, making it ten plus three.

Related pages

• Triskaidekaphobia

See also

In Spanish: Trece para niños