Four Fours/Lemmata/Three Fours/64/Solutions/3

Puzzle: Three Fours: $64$

Using exactly $3$ instances of the number $4$, the task is to write an expression for $64$, using whatever arithmetical operations you consider necessary.

Solution

$64 = 4 \times 4 \times 4$

Sources

• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $109$. The Two Fours