Four Fours/57
Jump to navigation
Jump to search
Puzzle
Using exactly $4$ instances of the number $4$, the task is to write an expression for $57$, using whatever arithmetical operations you consider necessary.
Solutions
Solution $1$
- $57 = 4! + 4! + \dfrac 4 {.\dot 4}$
Solution $2$
- $57 = \dfrac {4! + .4} {.4} - 4$
Solution $3$
- $57 = \dfrac {4!} {. \dot 4} + \sqrt {\dfrac 4 {. \dot 4} }$