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Six machines, each working at the same constant rate, [#permalink]
06 Apr 2006, 14:24
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Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?
This one is easy to solve, but I'm interested in finding out in how many different ways people can solve this. Please explain your answers.