GWD6-32

jj3323

If x is a positive integer, is the remainder 0 when (3^x+ 1)/10?
(1)x = 3n + 2, where n is a positive integer.
(2)x > 4

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 statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Answer: D

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我觉得都回答NO，那不就是充分的嘛？？？