Multiple choice

x is a prime number that is less than 7, what is x? 1) 8^ (- x) < 2^(- 12) 2) x > 4

  1. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

  2. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

  3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

  4. EACH statement ALONE is sufficient.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

1) only, 8^ (- x) = 2^ (- 3x) < 2^ (- 12) so - 3x < - 12, x > 4. Because x should be less than 7 and x is a prime number, x must be 5, sufficient 2) only, x > 4 and x < 7, x is prime number, x must be 5, sufficient.

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