Four Fours/23/Solutions/3

Puzzle: Four Fours: $23$

Using exactly $4$ instances of the number $4$, the task is to write an expression for $23$, using whatever arithmetical operations you consider necessary.

Solution

$23 = 4! - \dfrac {\sqrt 4 + \sqrt 4} 4$

Sources

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