GWD数学9-Q32
What is the remainder when the positive integer x is divided by 8?
(1)When x is divided by 12, the remainder is 5.
(2)When x is divided by 18, the remainder is 11.
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.
GWD数学10-Q4
If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?
Ⅰ1/8
Ⅱ 1/9
Ⅲ
1/10
A.None
B.I only
C.III only
D.II and III only
E.I, II, and III
GWD数学10-Q26
What is the greatest common factor of the positive integers j and k?
(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
请牛人指点~十分感谢！！
If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?
Ⅰ1/8
Ⅱ 1/9
Ⅲ
1/10
A.None
B.I only
C.III only
D.II and III only
E.I, II, and III
GWD数学10-Q26
What is the greatest common factor of the positive integers j and k?
(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
请牛人指点~十分感谢！！作者: michellehoS 时间: 2011-6-1 06:35
If S is the sum of the reciprocals of the consecutive integers from 91 to 100, inclusive, which of the following is less than S?
这个是求1/91加到1/100吧，S应该是在1/91*10到1/100*10之间，就是10/91到1/10之间，所以S大于1/10，又因为10/90大于10/91，所以1/9比S大，1/8也比S大，答案应该C吧。。。。作者: rockstonexS 时间: 2011-6-2 06:43
What is the greatest common factor of the positive integers j and k?
(1)k = j + 1
(2)jk is divisible by 5.
条件2单独显然不充分。
条件1中，k和j的值只相差1，所以最大公约数只可能是1啊，因为都是整数嘛，答案是A吗。。作者: timothyyung 时间: 2011-6-3 06:40
