Four Fours/Lemmata/Two Fours/24
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Puzzle
Using exactly $2$ instances of the number $4$, the task is to write an expression for $24$, using whatever arithmetical operations you consider necessary.
Solutions
Solution $1$
- $24 = \paren {\sqrt 4 + \sqrt 4}!$
Solution $2$
- $24 = \paren {\sqrt 4 \times \sqrt 4}!$
Solution $3$
- $24 = \map \Gamma 4 \times 4$