Four Fours/70/Solutions/3

Puzzle: Four Fours: $70$

Using exactly $4$ instances of the number $4$, the task is to write an expression for $70$, using whatever arithmetical operations you consider necessary.

Solution

$70 = \dfrac {4! + \sqrt 4 + \sqrt 4} {.4}$

Sources

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