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Calculate faster - Reciprocal percentage equivalent
Hi All,If one has to complete the quants section on the GMAT on time, it is imperative that one has to calculate faster. A lot of questions on the GMAT involve division. To divide faster reciprocal...
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GMAT Prep DS - John and Mary
This topic have been merged with: http://gmatclub.com/forum/topic-128007.html
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Marcia took a trip consisting of three segments at three
Marcia took a trip consisting of three segments at three different speeds: she drove a distance of (5D) at a speed of (2v), then a distance of (4D) at a speed of (3v), then a distance of D at a speed...
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If n > 2, then the sum,
If n > 2, then the sum, S, of the integers from 1 through n can be calculated by the followingformula: S = n(n + 1)/2. Which one of the following statements about S must be true?(A) S is always...
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The only contents in a container are green disks, blue disks
The only contents in a container are green disks, blue disks, and orange disks. If one disk is selected at random from the container, what is the probability that the disk is orange?(1) The ratio of...
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The only contents of a container are 4 blue disks and 8 gree
The only contents of a container are 4 blue disks and 8 green disks. If 3 disks are selected one after the other, and at random and without replacement from the container, what is the probability that...
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A collection of 36 cards consists of 4 sets of 9 cards each.
The Official Guide For GMAT Quantitative Review, 2ND EditionA collection of 36 cards consists of 4 sets of 9 cards each. The 9 cards in each set are numbered 1 through 9. If one card has been removed...
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In the xy-plane, point (r, s) lies on a circle with center a
The Official Guide For GMAT Quantitative Review, 2ND EditionIn the xy-plane, point (r, s) lies on a circle with center at the origin. What is the value of r^2 + s^2?(1) The circle has radius 2(2) The...
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What is the value of x ?
The Official Guide For GMAT Quantitative Review, 2ND EditionWhat is the value of x ?(1) -(x + y)= x- y(2) x + y = 2Data SufficiencyQuestion: 23Category:Algebra First- and second-degree equationsPage:...
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If r, s, and t are nonzero integers, is r^5*s^3*t^4 negative
The Official Guide For GMAT Quantitative Review, 2ND EditionIf r, s, and t are nonzero integers, is r^5*s^3*t^4 negative?(1) rt is negative(2) s is negative Data SufficiencyQuestion:...
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If x and y are integers, what is the value of y ?
The Official Guide For GMAT Quantitative Review, 2ND EditionIf x and y are integers, what is the value of y ?(1) xy = 27(2) x = y^2Data SufficiencyQuestion: 25Category:Arithmetic Arithmetic...
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Alice has x stamps and Thomas has y stamps, where x and y ar
Alice has x stamps and Thomas has y stamps, where x and y are positive integers. The ratio of x to y is 7 to 3. If Alice gives Thomas z stamps, where z is a positive integer and z < x, and no other...
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In how many different orders can the people Alice, Benjamin,
In how many different orders can the people Alice, Benjamin, Charlene, David, Elaine, Frederick, Gale, and Harold be standing on line if each of Alice, Benjamin, Charlene must be on the line before...
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On Monday a store had a sale on bottles of juice S and juice
On Monday a store had a sale on bottles of juice S and juice T. If 1/2 the total number of bottles of juice S in stock were sold on Monday, for which juice, S or T, were more of the bottles sold that...
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On average, Machine A will produce a completed item once eve
On average, Machine A will produce a completed item once every three minutes, and Machine B will produce a completed item once every seven minutes. The number of items Machine A produces in a 24-hour...
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The value of land increases by a% during June and decreases
The value of land increases by a% during June and decreases by b% during July. If the value of the land is the same at the end of July as at the beginning of June, what is b in terms of a?A....
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Solving Algebraic Expressions
Analysing my error log it seems I have some difficulties with solving "simplifying algebraic expressions". Can anyone help me where I could find some clear explanations how to solve these kind of...
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For every even positive integer m, f(m) represents
For every even positive integer m, f(m) represents the product of all even integers from 2 to m, inclusive. For example, f(12)=2x4x6x8x10x12. What is the greatest prime factor of f(24)?A. 23B. 19C....
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sum of roots of quadratic equations
the sum of the roots of two quadratic equations are equal. if the roots of both the equations are integers, and the roots of the first equation are in the ratio 3:7, while the roots of second equation...
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BE and CD are both diameters of circle with center A.
BE and CD are both diameters of circle with center A (see figure in the attachment). If the area of Circle A is 180 units2, what is the area of sector ABC + sector ADE1a. 40b. 140c. 20d. 90I solved...
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