08/10/17
Cubes and Pyramids
A box contains both cubes and five-sided pyramids. The total number of objects in the box is 17. The total number of sides for the cubes and pyramids is 95. How many cubes are in the box?
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08/10/17
Bob takes the subway to work
Bob takes the subway to work and uses an escalator at the railway station. If Bob runs up 8 steps of the escalator, then it takes him 46.5 seconds to reach the top of the escalator. If he runs up...
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