## Search found 418 matches

#### If x = u^2 â€“ v^2 and y = 2uv

##### If x = u^2 â€“ v^2 and y = 2uv

If x = u^2 â€“ v^2, y = 2uv, and z = u^2 + v^2 , and if x = 11, what is the value of z (1) y = 60 (2) u = 6 statement (2) is easier- sufficient For statement (1), I expressed (u^2 â€“ v^2) as a difference of two squares => (u+v)(u-v) Recognizing that u^2 â€“ v^2 can be expressed as a difference of t...

by gmatdriller

Thu Sep 24, 2015 3:40 pm
Forum: Data Sufficiency
Topic: If x = u^2 â€“ v^2 and y = 2uv
Replies: 5
Views: 4948

#### Most of Portugalâ€™s 250,000 university students

###### Sentence Correction

Though the correct response here is D. What happens if D where framed as shown below: ...university students boycotted classes in a one-day strike to protest a law that requires them to contribute $330 aâ€¦ year, instead of the$7 per year required previously toward the cost of higher education This...

by gmatdriller

Sun Sep 13, 2015 5:16 am
Forum: Sentence Correction
Topic: Most of Portugalâ€™s 250,000 university students
Replies: 10
Views: 4091

#### During the month of May, crabs arrive in Delwareâ€™s beaches

###### Critical Reasoning

Thanks GmatGuru. Analyzing B & D: Generally, there is a decline in eggs and the result might threaten the shorebitd population. Cause: Decline in crab eggs; Effect: Threat to the shorebird population. B: States the cause of the "Cause & Effect" relationship i.e why the decline occurred. Doesn't effe...

by gmatdriller

Sun Sep 13, 2015 5:01 am
Forum: Critical Reasoning
Topic: During the month of May, crabs arrive in Delwareâ€™s beaches
Replies: 6
Views: 4186

#### During the month of May, crabs arrive in Delwareâ€™s beaches

##### During the month of May, crabs arrive in Delwareâ€™s beaches

During the month of May, crabs arrive in Delwareâ€™s beaches to lay eggs. Certain shorebirds depend on these eggs for food during their annual spring migration to their northern breeding grounds. Delwareâ€™s crab population has declined recently. This decline, however, poses no serious threat to the...

by gmatdriller

Sat Sep 12, 2015 3:32 am
Forum: Critical Reasoning
Topic: During the month of May, crabs arrive in Delwareâ€™s beaches
Replies: 6
Views: 4186

#### combo

###### Problem Solving

What is the difference if the question had asked: In how many ways can 4 children be assigned 16 different gifts...? Assume a child can receive as few as 0 gifts and as many as 16. Thanks Same problem. Since it is possible for a child not to receive a gift, but each gift MUST be given to a child, w...

by gmatdriller

Thu Sep 10, 2015 11:46 am
Forum: Problem Solving
Topic: combo
Replies: 14
Views: 3493

#### combo

###### Problem Solving

In how many ways can 4 children be assigned 16 different gifts...?
Assume a child can receive as few as 0 gifts and as many as 16.

Thanks

by gmatdriller

Thu Sep 10, 2015 5:02 am
Forum: Problem Solving
Topic: combo
Replies: 14
Views: 3493

#### Use of colon

###### Sentence Correction

I'll opt for A in this case; "his life uprooted by..." is a modifier with no active verb B: The defense lawyer AND witness portrayed..., AND his life uprooted X, and Y: active Vs passive; Also, "and his life" cannot refer to "Defense Lawyer and witness" C: Independent clause, AND Dependent clause; u...

by gmatdriller

Thu Sep 10, 2015 3:27 am
Forum: Sentence Correction
Topic: Use of colon
Replies: 1
Views: 978

#### SC : Tough one

###### Sentence Correction

I'll prefer A here.
Declined other options using "with" bcos it's supposed to function as a PREP - no active verbs

Expert Opinions pls.

by gmatdriller

Thu Sep 10, 2015 1:20 am
Forum: Sentence Correction
Topic: SC : Tough one
Replies: 2
Views: 1108

#### BTG practice questions: military

###### Critical Reasoning

C: Option C reflects the shrinking of resources(soldiers) in favor of advanced weaponry: 40 reduced to only 2; larger ones reduced to only a few. E: The passage only mentioned "positions" - not "strategic positions or "strategic weapons" Also, E does not highlight the drastic reduction of resources ...

by gmatdriller

Thu Sep 10, 2015 1:10 am
Forum: Critical Reasoning
Topic: BTG practice questions: military
Replies: 18
Views: 10517

#### Standard deviation

###### Data Sufficiency

SD on the gmat would not require such an intensive calculation. You can visualize the SD of a set of data points. If A = 2,2,2 and B = 1,1,3 Mean of A = 2; Mean of B = 1.67 You would agree that the elements in A are closely packed towards the mean(2) than are the elements in set B towards 1.67... So...

by gmatdriller

Wed Sep 09, 2015 12:32 am
Forum: Data Sufficiency
Topic: Standard deviation
Replies: 24
Views: 14898

#### Number properties - prime factors

###### Data Sufficiency

4 = 2 x 2 (factors of 4 = 1, 2, & 4)...only 1 prime factor(2) 9 = 3 x 3 (factors of 9 = 1, 3, & 9)...only 1 prime factor(3) 16 = 4 x 4(factors of 16 = 1,2,4,8,& 16)...only 1 prime factor(2) 25 = 5 x 5 (factors of 25 = 1,5, & 25)....only 1 prime factor(5) 36 = 4 x 9 (factors of 36= 1,2,3,4,6,8,12,18,...

by gmatdriller

Tue Sep 08, 2015 11:18 pm
Forum: Data Sufficiency
Topic: Number properties - prime factors
Replies: 27
Views: 13006

#### Statistics

###### Problem Solving

Hi sandipgumtya, When it comes to probability questions, there are only two things that you can calculate: what you WANT to have happen and what you DON'T want to have happen. Since the probability of what you WANT + the probability of what you DON'T WANT will always add up to the number 1, in cert...

by gmatdriller

Tue Sep 08, 2015 10:49 pm
Forum: Problem Solving
Topic: Statistics
Replies: 12
Views: 4005

#### Inorganic pesticides remain active

###### Critical Reasoning

INORGANIC FRUITS: Pesticides remain for days - be careful ORGANIC FRUITS: Pesticides disappear within a few hours- feel free to consume So, why would the argument recommend only organic fruits? I think the advice is based on the relative periods within which the pesticides remain on the fruits - tha...

by gmatdriller

Tue Sep 08, 2015 4:40 pm
Forum: Critical Reasoning
Topic: Inorganic pesticides remain active
Replies: 8
Views: 1776

#### Two types of earthworm - Veritas

###### Critical Reasoning

The lesson here is that conclusion is KING.

Meanwhile, would A be a valid choice for ASSUMPTION / INFERENCE?

by gmatdriller

Tue Sep 08, 2015 3:58 pm
Forum: Critical Reasoning
Topic: Two types of earthworm - Veritas
Replies: 15
Views: 4090

#### Speed Time Distance MGMAT

###### Problem Solving

Since both A and B started at the same time, they both spent same time, t. Let d be the extra distance B traveled beyond 30m. Time spent by Ashok = Time spent by Brian Time spent by Ashok = distance traveled / speed = Let Speed of Ashok = a meters; distance = 30 + d Time spent by Ashok = (30+d)/a......

by gmatdriller

Fri Sep 04, 2015 4:10 am
Forum: Problem Solving
Topic: Speed Time Distance MGMAT
Replies: 5
Views: 1205