Tag Archives: recreational maths

Numbers of the World

Recently Matt Parker uploaded a video to his YouTube channel where he discussed numbers and the words used to represent them in different languages, more precisely the length of these words:

The basic idea is the following:

  1. one has 3 letters,
  2. two has 3 letters,
  3. three has 5 letters,
  4. four has 4 letters,
  5. five has 4 letters,
  6. six has 3 letters,
  7. seven has 5 letters,
  8. eight has 5 letters,
  9. nine has 4 letters,
  10. ten has 3 letters,

and so on... This can be seen as a function

f(n) = \text{number of letters of $n$ spelled out}.

Continue reading Numbers of the World