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| Simple problems like this provide a model for a large range of everyday problems. The words change, the symbols change, the numbers change and the ideas change. The problem solving process remains the same. |
The problem is one of the Brain Teasers provided by Kaplan Education Centers. The site provides access to extensive information and resources on a variety of standard evaluation tests (SAT, GRE, MCAT etc) as well as other educational resources. This is a valuable educational site. |