GWD管衛(wèi)東GMAT 第7套題
If x is a positive integer,is theremainder 0 when 3^X + 1 is divided by 10?（X是指數(shù),我電腦表示不出來）
(1) x = 4n + 2,where n is apositive integer.
(2) x> 4
A.Statement (1) ALONE is sufficient,but statement (2) alone isnot sufficient.
B.Statement (2) ALONE issufficient,but statement (1) alone is not sufficient.
C.BOTH statements TOGETHERare sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE issufficient.
E.Statements (1) and (2)TOGETHER are NOT sufficient.
想不通啊