Four Fours/28

From ProofWiki
Jump to navigation Jump to search

Puzzle

Using exactly $4$ instances of the number $4$, the task is to write an expression for $28$, using whatever arithmetical operations you consider necessary.


Solutions

Solution $1$

$28 = 4! + 4 + 4 - 4$

Solution $2$

$28 = \dfrac {4! \times 4} 4 + 4$


Also see

Previous  ... Next