GMAT OG2019_数学
GMAT OG2019 数学DS新题第326题（附解析） certain housing development, the average (arithmetic mean) price of 20 new houses was \$160,000. Did more than 9 of the 20 houses have prices that were less than the average price l
GMAT OG2019 数学DS新题第318题（附解析） If xy≠0, is x³+ y³ >0 ? (1) x+y>0(2) xy>0
GMAT OG2019 数学DS新题第301题（附解析） Is the sum of the prices of the 3 books that Shana bought less than \$48 ?(1) The price of the most expensive of the 3 books that Shana bought is less than \$17.(2) The price of the
GMAT OG2019 数学DS新题第293题（附解析） If n is an integer, what is the greatest common divisor of 12 and n？(1) The product of 12 and n is 432(2) The greatest common divisor of 24 and n is 12

GMAT OG2019 数学DS新题第290题（附解析） The 10 students in a history class recently took an examination. What was the maximum score on the examination?(1) The mean of the scores was 75,(2) The standard deviation of the s
GMAT OG2019 数学DS新题第288题（附解析） On June 1, Mary paid Omar \$360 for rent and utilities for the month of June. Mary moved out early, and Omar refunded the money she paid for utilities, but not for rent, for the day
GMAT OG2019 数学DS新题第278题（附解析） Is x+1/y＞x/y ?(1) 0 < x < y (2) xy > 0

GMAT OG2019 数学DS新题第277题（附解析） In a real estate office that employs n salespeople, f of them are females and x of the females are new employees. What is the value of n ?(1) If an employee were randomly selected
GMAT OG2019 数学DS新题第261题（附解析） What is the circumference of circle C ?(1) The radius of circle C is 2π (2) The center of circle C is located at point (7, 8)in the xy-plane
GMAT OG2019 数学DS新题第255题（附解析） If a+b+c=12, what is the value of b ?(1)a+b=8;(2)b+c=6
GMAT OG2019 数学DS新题第251题（附解析） Machine R and machine S work at their respective constant rates. How much time does it take machine R, working alone, to complete a certain job ?(1) The amount of time that it take
GMAT OG2019 数学DS新题第249题（附解析） Was the amount of John’ s heating bill for February greater than it was for January ? (1) The ratio of the amount of John's heating bill for February to that for January was 26/2
GMAT OG2019 数学DS新题第248题（附解析） Last semester, Professor K taught two classes, A and B. Each student in class A handed in 7 assignments, and each student in class B handed in 5 assignments. How many students were
GMAT OG2019 数学DS新题第244题（附解析） How many men are in a certain company’s vanpool program ?(1) The ratio of men to women in the program is 3 to 2. (2) The men and women in the program fill 6 vans.
GMAT OG2019 数学DS新题第243题（附解析） In a recent town election, what was the ratio of the number of votes in favor of a certain proposal to the number of votes against the proposal ?
(1) There were 60 more votes in f