* How to Solve It* (1945) is a small volume by mathematician George Pólya describing methods of problem solving.

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*How to Solve It* suggests the following steps when solving a mathematical problem:

- First, you have to
*understand the problem*.^{[2]} - After understanding, then
*make a plan*.^{[3]} *Carry out the plan*.^{[4]}*Look back*on your work.^{[5]}How could it be better?

If this technique fails, Pólya advises:^{[6]} “If you can’t solve a problem, then there is an easier problem you can solve: find it.”^{[7]} Or: “If you cannot solve the proposed problem, try to solve first some related problem. Could you imagine a more accessible related problem?”