GMAT GWD一道 求讲解

GMAT GWD一道 求讲解
Q26:
What is the greatest common factor of the positive integers j and
(1) k = j + 1
(2) jk is divisible by 5.
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.
看题成么

j和k的最大公因数是多少?
1.k=j+1 的话那么最大公因数就是1.
2.jk能被5整除说明j或者k能被5整除.比如j=30,k=60那么最大公因数是30,j=5 k=10 那么最大公因数是5.这个条件没用.
答案A吧