Four Fours/8

Puzzle

Using exactly $4$ instances of the number $4$, the task is to write an expression for $8$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$8 = \paren {4 \times 4} - \paren {4 + 4}$

Solution $2$

$8 = 4 + 4 + 4 - 4$

Solution $3$

$8 = \sqrt 4 + \sqrt 4 + \sqrt 4 + \sqrt 4$

Also see

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