11/Historical Note

Historical Note on $11$ (Eleven)

Some of the archaic imperial units of length appear as divisors and multiples of other such units with a multiplicity of $11$, for example:

$4$ rods, poles or perches equal $22$ yards equal $1$ chain
$220 = 11 \times 20$ yards equal $1$ furlong
$1760 = 11 \times 160$ yards equal $1$ (international) mile.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $11$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $11$
This article is issued from ProofWiki. The text is available under Creative Commons Attribution-ShareAlike License unless otherwise noted. Additional terms may apply for the media files.