Respond to the request. The example is intended to emphasize the idea of starting a problem solution using a simple, obvious idea. Lack of success in solving a problem is frequently overkill in the starting statement - jumping right into the math for example. The idea comes first,then the math. If you find your mind going around in circles in trying to figure out how to start you are apt to fail to solve a problem.
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Please comment . A SureMath solution. Copyright 1998, Howard C. McAllister.