GMAT Problem Solving

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Source: GWD

Level: 4

A set of numbers has the property that for any number t in the set, t + 2 is in the set. If -1 is in the set, which of the following must also be in the set?

I.-3

II.1

III.5

  • A I only
  • B II only
  • C I and II only
  • D II and III only
  • E I, II, and III

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