Method of Solving Mathematical Problems
Puzzle 5 of Valuable Things Hard Pack
Question is: Method of Solving Mathematical Problems
and the answer is: ALGORITHM
Word Meaning:
ALGORITHM — (countable) A collection of ordered steps that solve a mathematical problem. A precise step-by-step plan for a computational procedure that possibly begins with an input value and yields an output value in a finite number of steps.
Definitions from Wiktionary.