hard · GMAT Quant
A quality manager tracks batch shipment counts represented by a positive integer x. The count satisfies two conditions: x^2 - 1 is divisible by 8, and x is not divisible by 3. Which of the following statements must be true? I. x is odd. II. x^2 - 1 is divisible by 24. III. x + 1 is divisible by 3.
- None
- I only
- II only
- I and II only
- I, II, and III
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