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posted by Stranger Saturday, April 20, 2013 at 4:45pm.

There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?

it is greater than 61

it is less than 80

it is less than 70

it is less than 65

is it 49

no tis not 49

The Answer is 61.

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