Four Fours/55/Solutions/1

Puzzle: Four Fours: $55$

Using exactly $4$ instances of the number $4$, the task is to write an expression for $55$, using whatever arithmetical operations you consider necessary.

Solution

$55 = \dfrac {4!} {. \dot 4} + \dfrac 4 4$

Sources

• 1964: L.H. Clarke: Fun with Figures ... (previous) ... (next): Solutions: $(46)$