Four Fours/75/Solutions/2
< Four Fours | 75 | Solutions
Jump to navigation
Jump to search
Puzzle: Four Fours: $75$
Using exactly $4$ instances of the number $4$, the task is to write an expression for $75$, using whatever arithmetical operations you consider necessary.
Solution
- $75 = \dfrac {4! \times \sqrt 4 + \sqrt 4} {\sqrt {. \dot 4} }$
Sources
- 1980: Angela Dunn: Mathematical Bafflers (revised ed.) ... (previous) ... (next): $1$. Say it with Letters: Algebraic Amusements: Four Fours