Henry Ernest Dudeney/Modern Puzzles/216 - Fifty-Seven to Nothing/Solution 1

by : $216$

 * Fifty-Seven to Nothing

Solution
The dotted lines are where the matches were moved from, and the red lines are where they were moved to.


 * Dudeney-Modern-Puzzles-216-solution-1.png

That is: $\sqrt 1 - 1$ which is of course $0$.