Recognizing when two arithmetic expressions are essentially the same Code for solving “24” puzzles. For example:

 Given only the numbers 1, 3, 4, and 6, combine them using only
 ordinary addition, subtraction, multiplication, and division, to
 make the number 24.

Discussions about this on my blog:

• “A simple but difficult arithmetic puzzle”
• “Solving twenty-four puzzles”
• “Recognizing when two arithmetic expressions are essentially the same”

I, Mark Dominus, the author of the material in this Git repository, hosted at https://github.com/mjdominus/24-puzzle-solver, hereby relinquish all copyrights and other property rights in the material, completely and in perpetuity, and place it entirely in the public domain.