General Aptitude Question:

A square is to circle as cube is to?

cube is to sphere.

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One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?	Success is to failure as joy is to?