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The percent increase from x to y is equal to the percent increase from y to z.
Implication:
x/y = y/z
Hi Mitch,

Thanks for responding.

Isn't percentage increase equation be the following?

(x-y)/x = (y-z)/y

by bubbliiiiiiii

Tue Sep 01, 2015 4:18 am
Forum: Data Sufficiency
Topic: MGMAT Advanced quant - Hybrid problem
Replies: 7
Views: 2332

MGMAT Advanced quant - Hybrid problem

If x, y, and z are all distinct positive integers and the percent increase from x to y is equal to the percent increase from y to z, what is x? (1) y is prime (2) z = 9

Manhattan Prep (2015-05-17). GMAT Advanced Quant (Kindle Locations 4099-4101). Manhattan Prep Publishing. Kindle Edition.

OA A

by bubbliiiiiiii

Tue Sep 01, 2015 1:44 am
Forum: Data Sufficiency
Topic: MGMAT Advanced quant - Hybrid problem
Replies: 7
Views: 2332

MGMAT Advanced quant - Hybrid problem

If x and y are positive integers greater than 1 such that x − y and are both even integers, which of the following numbers must be non-prime integers? I. x II. x + y III. y/x (A) I only (B) II only (C) III only (D) I and II only (E) I, II and III Manhattan Prep (2015-05-17). GMAT Advanced Quant (K...

by bubbliiiiiiii

Mon Aug 31, 2015 10:37 pm
Forum: Problem Solving
Topic: MGMAT Advanced quant - Hybrid problem
Replies: 2
Views: 1293

GCF - MGMAT

The greatest common factor of 16 and the positive integer n is 4, and the greatest common factor of n and 45 is 3. Which of the following could be the greatest common factor of n and 210?

3

14

30

42

70

OA D

by bubbliiiiiiii

Fri Aug 28, 2015 3:40 am
Forum: Problem Solving
Topic: GCF - MGMAT
Replies: 3
Views: 2022

The Emperor Augustus, it appears, commissioned an idealized sculpture portrait, the features of which are so unrealistic as to constitute what one scholar calls an "artificial face." A) so unrealistic as to constitute B )so unrealistic they constituted C )so unrealistic that they have con...

by bubbliiiiiiii

Thu Aug 27, 2015 2:31 am
Forum: Sentence Correction
Topic: so X as to and so X that
Replies: 1
Views: 1166

Hardiness Zones - Zones based on average winter temperature and the type of plants that survive temperatures. Zone 1 - coldest and Zone 13 - warmest. Zones ( I suppose hardiness zones) are closely corelated with another set of zones based on length of growing season. Minneapolis - Zone 4 Denver - Zo...

by bubbliiiiiiii

Thu Aug 27, 2015 2:19 am
Forum: Critical Reasoning
Topic: Hardiness Zones - Must Be True Question
Replies: 5
Views: 1785

Inequalities from Manhattan Advanced Quant

If abcd ≠ 0, is abcd < 0?

1. a/b > c/d
2. b/a > d/c

Manhattan Prep (2015-05-17). GMAT Advanced Quant (Kindle Locations 2464-2466). Manhattan Prep Publishing. Kindle Edition.

OA C

by bubbliiiiiiii

Wed Aug 26, 2015 10:29 pm
Forum: Data Sufficiency
Topic: Inequalities from Manhattan Advanced Quant
Replies: 2
Views: 1635

Integers ..

If x and y are positive integers, is y odd? (1) (y+2)!/x! is an odd integer. (2) (y+2)!/x! is greater than 2. Manhattan Prep (2015-05-17). GMAT Advanced Quant (Kindle Locations 1695-1697). Manhattan Prep Publishing. Kindle Edition. OA C Sorry for erroneously posting in wrong forum. Can somebody with...

by bubbliiiiiiii

Wed Aug 26, 2015 12:56 am
Forum: Problem Solving
Topic: Integers ..
Replies: 6
Views: 3148

x(x2 - 16) < 0

=> x < 0, x < 4 and x < -4

D satisfies all three.

by bubbliiiiiiii

Tue Aug 25, 2015 10:36 pm
Forum: Problem Solving
Topic: Inequality
Replies: 2
Views: 1227

As a result of a supernova explosion, every human being on Earth was bombarded on February 23, 1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that are produced in nuclear reactions and that interact very weakly with matter. There are two dependent cla...


Inequalities from Manhattan Advanced Quant

If x and y are integers and 4xy = x2y + 4y, what is the value of xy?

(1) y − x = 2
(2) x3 < 0

OA B

My question:

[spoiler]Why can't we cancel out y in question stem and work with a quadratic equation in x?[/spoiler]

by bubbliiiiiiii

Tue Aug 25, 2015 4:35 am
Forum: Data Sufficiency
Topic: Inequalities from Manhattan Advanced Quant
Replies: 4
Views: 1910

In Colorado subalpine meadows, non-native dandelions co-occur with a native flower, the larkspur. Bumblebees visit both species, creating the potential for interactions between the two species with respect to pollination. In a recent study, researchers selected 6 plots containing both species; all ...

by bubbliiiiiiii

Tue Aug 04, 2015 4:00 am
Forum: Critical Reasoning
Topic: In Colorado subalpine meadows
Replies: 7
Views: 6672

Brent@GMATPrepNow wrote:
Answer choices A, C and D are irrelevant since they have nothing to do with the actual composition of the submissions. ELIMINATE A, C and D
Can you please review my post above and elaborate?

by bubbliiiiiiii

Mon Aug 03, 2015 9:38 am
Forum: Critical Reasoning
Topic: CR prep question
Replies: 15
Views: 12779

A manager at a local theme park has proposed doubling the number of attendants at the park's entrance gates, claiming the new attendants will alleviate line congestion. The manager reasons that, since the wait times at the entrance will be reduced from about thirty minutes to ten minutes, more peop...

by bubbliiiiiiii

Mon Aug 03, 2015 6:08 am
Forum: Critical Reasoning
Topic: very tough CR2..Please help....
Replies: 2
Views: 1478

To prevent a newly built dam on the Chiff River from blocking the route of fish migrating to breeding grounds upstream, the dam includes a fish pass, a mechanism designed to allow fish through the dam. Before the construction of the dam and fish pass, several thousand fish a day swam upriver during...