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PREP07 Test 1 If a, b, k, and m are positive integers, is $${a}^{k}$$ a factor of $${b}^{m}$$? (1) a is a factor of b. (2) $$k \leq m$$
几何 GMAT、gmat题库、gmat模考、gmat考满分In the figure above, the area of square region PRTV is 81, and the ratio of the area of square region XSTU to the area of square region PQXW is 1 to 4. What is the length of segment RS?
应用题 A total of 30 percent of the geese included in a certain migration study were male. If some of the geese migrated during the study and 20 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese?[Migration rate for geese of a certain sex = (number of geese of that sex migrating) / (total number of geese of that sex)]
Raymond purchased a package of ground beef at a cost of $1.98 per pound. If, for the same amount of money, Raymond could have purchased a piece of steak that weighed 40 percent less than the package of ground beef, what was the cost per pound of the steak?
PREP07 Test 2 A rectangular region has a fence along three sides and a wall along the fourth side. The fenced side opposite the wall is twice the length of each of the other two fenced sides. If the area of the rectangular region is 128 square feet, what is the total length of the fence, in feet?
If $$x\neq$$ 0, then $$({x}+\frac{1}{x})^{2}-({x}-\frac{1}{x})^{2}=$$
K is a set of integers such that if the integer r is in K, then r + 1 is also in K. Is 100 in K?(1) 50 is in K.(2) 150 is in K.
PREP07 Test 1 The sum of positive integers x and y is 77. What is the value of xy?(1) x = y + 1(2) x and y have the same tens digit.
From 1985 to 1994, what was the percent increase in total United States trade?(1) Total United States trade in 1985 was 17 percent of gross domestic product in 1985.(2) Total United States trade in 1994 was 23 percent of gross domestic product in 1994.
If $$({2}-\sqrt{5}){x}=-{1}$$, then x =
The operation $$\Theta$$ is defined by $${x}\Theta{y}=\frac{1}{x}+\frac{1}{y}$$ for all nonzero numbers x and y. If z is a number greater than 1, which of the following must be true? I. $$z\Theta(-z) = 0$$II.$${z}\Theta{\frac{z}{z-1}}={1}$$III. $$(\frac{2}{z})\Theta(\frac{2}{z})={z}$$
In a meeting of 3 representatives from each of 6 different companies, each person shook hands with every person not from his or her own company. If the representatives did not shake hands with people from their own company, how many handshakes took place?
At a certain company, the average (arithmetic mean) salary of 10 of the employees is $30,000, the average salary of 30 other employees is $40,000, and the average salary of the remaining 20 employees is $60,000. What is the average salary of the 60 employees at the company?
GMAT、gmat题库、gmat模考、gmat考满分Is quadrilateral ABCD a square?(1) AB = BC = CD = DA(2) x + y = 180
If the average (arithmetic mean) of 5 different numbers is 12, what is the median of the 5 numbers?(1) The median of the 5 numbers is equal to $$\frac{1}{3}$$ of the sum of the 4 numbers other than the median.(2) The sum of the 4 numbers other than the median is equal to 45.
OG15 OG16 OG17 OG18 OG19 OG20 OG2022 An object thrown directly upward is at a height of h feet after t seconds, where $${h}=-{16}({t}-{3})^{2}+{150}$$. At what height, in feet, is the object 2 seconds after it reaches its maximum height?
GMAT、gmat题库、gmat模考、gmat考满分The graph above shows the combined revenue, in billions of dollars, of a chain of food stores for each year over a four-year period. In 1994 a certain store's revenue accounted for 2.0 percent of the combined revenue for that year, and in the 1995 the same store accounted for 2.3 percent of the combined revenue for that year. What was the approximate percent increase in revenue for this store from 1994 to 1995 ?
In a survey, 2,500 executives were each asked whether they read Newsletter A or Newsletter B. According to the survey, 55 percent of the executives read Newsletter A, 62 percent read Newsletter B, and 37 percent read both Newsletter A and Newsletter B. How many of the executives surveyed read neither Newsletter A nor Newsletter B?
Sue's monthly earnings consist of a monthly salary and a 4 percent commission on the portion of her monthly sales that is in excess of $2,000. If Sue's monthly salary was the same in July as in August, how much greater were her sales in July than in August?(1) Sue's monthly earnings were $3,620 in July and $3,580 in August.(2) Sue's monthly salary was $3,500 in July and in August.
If $$xy \neq 0$$, what is the value of $${{1}\over{x}}+{{1}\over{y}}$$ ?(1) $${{1}\over{(x+y)}}=-1$$(2) $$xy=6(x+y)$$