Four Fours/107

From ProofWiki
Jump to navigation Jump to search

Puzzle

Using exactly $4$ instances of the number $4$, the task is to write an expression for $107$, using whatever arithmetical operations you consider necessary.


Solutions

Solution $1$

$107 = \dfrac {4! + {4!} - {. \dot 4} } {. \dot 4}$


Also see

Previous  ... Next