GMAT Data Sufficiency

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Source: GWD

Level: 5

If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r?

(1) 2 is not a factor of n.

(2) 3 is not a factor of n.

  • A Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  • B Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  • C BOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
  • D EACH statement ALONE is sufficient.
  • E Statements (1) and (2) TOGETHER are NOT sufficient.

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