In science, Feynman problem solving algorithm is a basic problem solving technique, used by many scientists, consisting of three steps, first write down the problem, second think very hard, third write down the answer. 
The Feynman problem solving algorithm is used frequently by American electrochemical engineer Libb Thims.
Often is the case, however, that step one involves the unconscious writing down of the problem in their head, two, many partial stabs at solution, followed by retraction, withdraw, and storage of the problem, followed by three writing down the solution.
Etymology The technique was said to be common to American physicist Richard Feynman, as facetiously observed by his colleague Murray Gell-Mann, as reported in the New York Times.
Other Feynman also, supposedly, had a standing bet that he could solve any problem to within 10% within 60 seconds. (Ѻ)
References 1. Thims, Libb. (2007). Human Chemistry (Volume One) (Feynman problem solving algorithm, pg. 118). Morrisville, NC: LuLu.
Videos ● Anon. (2015). “The Feynman Technique” (Ѻ), Sprouts, YouTube, Oct 12.