easy · GMAT Quant

A quality control scanner inspects Batch X every 16 minutes and Batch Y every 20 minutes. If both batches begin inspection at t = 0 minutes

What is the smallest positive number of minutes that will elapse before both batches begin inspection at the exact same time again?

  1. 80
  2. 320
  3. 4
  4. 160
  5. 84

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