Four Fours/12/Solutions/5

Puzzle: Four Fours: $12$

Using exactly $4$ instances of the number $4$, the task is to write an expression for $12$, using whatever arithmetical operations you consider necessary.

Solution

$12 = 4 + 4 + \sqrt 4 + \sqrt 4$

Sources

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