1. UNDERSTANDING THE PROBLEM

  1. UNDERSTANDING THE PROBLEM
  2. DEVISING A PLAN
  3. CARRYING OUT THE PLAN
  4. LOOKING BACK

First. You have to understand the problem…. What is the unknown? What are the data? What is the condition? Is it possible to satisfy the condition? Is the condition sufficient to determine the unknown? Or is it insufficient? Or redundant? Or contradictory?

-- G.Polya "HOW TO SOLVE IT", Kindle Edition, 2014

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