GMAT Problem Solving

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Source: Princeton

Level: 3

David is hiking the Appalachian Trail, which is 2100 miles long. He plans to go into town to call home once he has hiked more than 20 percent of the total distance. If David has already hiked 1 percent of the trail, what is the minimum number of additional miles that he must hike before he goes into town?

  • A 399
  • B 400
  • C 401
  • D 420
  • E 421

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