The number 13 is considered unlucky because people have believed it brings bad luck for a long time. Many stories and traditions, like the idea of having 13 people at a table causing problems, helped make 13 feel mysterious or even scary to some people. So now, hotels skip room 13 and some people avoid doing big things on the 13th day of the month.
Examples
- Some people skip going to the movies on Friday the 13th just in case something goes wrong.
- There are 12 months in a year, so adding an extra one feels like breaking time's rhythm.
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See also
- Why Do Numbers Sometimes Look Like Shapes?
- Why Do Numbers Feel So Magical?
- Why Do Numbers Sometimes Look Like They’re Talking?
- Why Does π Show Up in Places You’d Never Expect?
- What are mathematicians?