This schema is adapted from the book How to Solve It, by George Pòlya, published by Princeton University Press. Everyone who reads this page should seriously consider buying the book. I consider this "fair use" as an advertisement, rather than a copyright infringement. Please don't sue me.

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1. Understanding the Problem.

First you have to understand the problem.

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2. Devising a Plan.

Find the connection between the data and the unknown. You may be obliged to consider auxiliary problems if an immediate connection cannot be found. You should obtain eventually a plan of the solution.

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3. Carrying out the Plan.

Carry out your plan.

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4. Looking back.

Examine the solution obtained.