2017年GMAT数学训练题
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GMAT数学训练题一
If k is a positive integer, then 20kis divisible by how many different positive integers?
(1) k is prime.
(2) k = 7
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 TOGETHERare sufficient, but NEITHER statementALONE is sufficient.
D. EACH statement ALONE issufficient.
E. Statement (1) and statement (2) TOGETHER are NOT sufficient.
参考答案:B
题目翻译:k是正整数,20倍的k能被多少正整数除开?(1)k是质数;(2)k=7。
题目全解:(类型题)
Finding the Number of Factors of an Integer
GMAT数学训练题二
A certaindealership has a number of cars to be sold by its sales people. How many cars are to be sold?
(1) If each of the salespeople sales 4 of thecars, 23 cars will remain unsold.
(2) If each of the salespeople sales 6 of thecars, 5 cars will remain unsold.
ement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
ement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C. BOTH statementsTOGETHER are sufficient, but NEITHER statement ALONE issufficient.
D. EACHstatement ALONE is sufficient.
ements (1) and (2) TOGETHER are NOT sufficient.
参考答案:C
题目翻译:有等式(12^x)[4^(2x+1)] = (2^k)(3^2),其中k和x都是整数,求k。
题目全解:(1) Says T- 4n = 23 Insuff
(2) says T-6n = 5 Insuff
Together find n and arrive at T
Hence C
GMAT数学训练题三
A certainfarmer pays $30 per acre per month to rent farmland. How much does the farmer pay per month torent a rectangular plot of farmland that is 360 feet by 605 feet? (43,560 square feet = 1 acre)
A. $5,330
B. $3,360
C. $1,350
D. $360
E. $150
参考答案:E
题目翻译:农民大叔花30租一个月一亩地,那他租一个360feet宽605feet长的农场要多钱?
题目全解:(360*605)/43560=5;5*30=150.
GMAT数学训练题四
If n and kare positive integers, is n/k an even integer?
(1) n is divisible by 8.
(2) k is divisible by 4.
ement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
ement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C. BOTH statementsTOGETHER are sufficient, but NEITHER statement ALONE issufficient.
D. EACHstatement ALONE is sufficient.
ements (1) and (2) TOGETHER are NOT sufficient.
参考答案:E
题目翻译:如果n和k都是正整数,那么n/k是不是偶数?
题目全解:First off, neither statements are sufficent alone b/c each provides info about one of the variables.
Putting the statments together--pick multiples of 8 for n and 4 for k:
n=8, 16, 24, 32, 40, 48 etc.
k=4, 8, 12, 16, 20, 24, 28, etc.
So, put the statements together:
-If n=8 and k=4-->2-->even
-If n=8 and k=8-->1-->odd
INSUFFICIENT. Choice E.
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