Four Fours/42

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Puzzle

Using exactly $4$ instances of the number $4$, the task is to write an expression for $41$, using whatever arithmetical operations you consider necessary.


Solutions

Solution $1$

$42 = 4! + 4! - 4 - \sqrt 4$

Solution $2$

$42 = \dfrac {4 \times 4} {.4} + \sqrt 4$

Solution $3$

$42 = 44 + \sqrt 4 - 4$


Also see

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