Search found 18 matches


(E) In an area devoid of volcanic activity, a team of scientists from the University of California has made the discovery of a fragment of the Swiss Alps that had seemingly come from a depth as far as 415 miles. 1. Is the Past Perfect of " Had come " correctly used in this sentence? 2. Is...

by AndreiGMAT

Sat Aug 20, 2016 8:55 pm
Forum: Sentence Correction
Topic: In an area devoid of volcanic activity
Replies: 7
Views: 3988

Hi Rich.C@EMPOWERgmat,

Thank you for the clear explanation. Can the problem be solved using algebraic way?

by AndreiGMAT

Tue Jul 19, 2016 1:35 pm
Forum: Data Sufficiency
Topic: Is xy>x/y?
Replies: 9
Views: 15428

Let's make it more challenging:

Is xy>x/y?

(1) 0<y<1
(2) xy>1

by AndreiGMAT

Tue Jul 19, 2016 6:53 am
Forum: Data Sufficiency
Topic: Is xy>x/y?
Replies: 9
Views: 15428

Matt, thank you for reply.

I need to choose specifically "Weighted Averages" questions level 600-700 on this forum. If anyone can help me how to filter the questions on this forum , I will appreciate.

Thanks

by AndreiGMAT

Wed Jun 08, 2016 12:03 am
Forum: Problem Solving
Topic: Percentage Problem
Replies: 31
Views: 18057

Patrick_GMATFix wrote:Hi askaichin

To practice weighted avg questions in timed drills, set topic='Weighted Averages' and difficulty='600-700 & 700+' in the Drill Generator
How to get to the drill for the selected topics for GMAT

by AndreiGMAT

Tue Jun 07, 2016 6:57 pm
Forum: Problem Solving
Topic: Percentage Problem
Replies: 31
Views: 18057

Thank you, this is new and extremely useful.

by AndreiGMAT

Wed Jun 01, 2016 7:34 am
Forum: Problem Solving
Topic: Sum of Integers (really annoying)
Replies: 7
Views: 3390

Mitch, that is surely an interesting approach. Thank you. But why "traditional" method doesn't work for me here? My way of thinking: a1 = 1/2 a100 = 1/10100 Number of integers = 100 Average = 5051/20200 Sum = (5051/20200)*100 = 5051/202 This method always worked with integers for me before...

by AndreiGMAT

Wed Jun 01, 2016 7:00 am
Forum: Problem Solving
Topic: Sum of Integers (really annoying)
Replies: 7
Views: 3390

Sum of Integers (really annoying)

From the Prep Exam Pack 5. Every time I end up with a wrong answer: 5051/202, which is far far from the right answer. Please, explain.


Image

by AndreiGMAT

Wed Jun 01, 2016 6:13 am
Forum: Problem Solving
Topic: Sum of Integers (really annoying)
Replies: 7
Views: 3390

GMATGuruNY, this is a very good explanation that made it clear for me. Thanks.

Please note that 295 is the UPPER LIMIT.
Any value below 295 -- even 294.999 -- is rounded DOWN to 290.

by AndreiGMAT

Mon May 02, 2016 4:30 am
Forum: Problem Solving
Topic: Rounding numbers - OG has mistake?
Replies: 8
Views: 2532

Rounding numbers - OG has mistake?

On a recent trip, Cindy drove her car 290 miles, rounded to the nearest 10 miles, and used 12 gallons of gasoline, rounded to the nearest gallon. The actual number of miles per gallon that Cindy's car got on this trip must have been between http://s32.postimg.org/wknlxi74x/answers.jpg Here is explan...

by AndreiGMAT

Sun May 01, 2016 11:20 pm
Forum: Problem Solving
Topic: Rounding numbers - OG has mistake?
Replies: 8
Views: 2532

Consecutive integers - complicated

If Q is an odd number and the median of Q consecutive integers is 120, what is the largest of these integers?

(A) (Q-1)/2+120
(B) Q/2+119
(C) Q/2+120
(D) (Q+119)/2
(E) (Q + 120)/2

I have no clue what this question is stating or asking and how to interpret the information.

Please, help

by AndreiGMAT

Sun May 01, 2016 5:38 pm
Forum: Problem Solving
Topic: Consecutive integers - complicated
Replies: 4
Views: 5784

Statistics Question with Image explanation

A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m + d? Answer: [spoiler]84%[/spoiler] I don't quite understand 100% ...

by AndreiGMAT

Sun May 01, 2016 4:05 pm
Forum: Problem Solving
Topic: Statistics Question with Image explanation
Replies: 1
Views: 1018

GMATGuruNY


You are so to the point!
The questions says: Xavier AND Yvonne, but not Zelda, not Xavier OR Yvonne.

by AndreiGMAT

Thu Apr 28, 2016 12:32 am
Forum: Problem Solving
Topic: Probability - What's Wrong?
Replies: 6
Views: 2194

Probability - What's Wrong?

Xavier, Yvonne, and Zelda each try independently to solve a problem. If their individual probabilities for success are 1/4, 1/2 and 5/8, respectively, what is the probability that Xavier and Yvonne, but not Zelda, will solve the problem? (A) 11/8, (B) 7/8, (C) 9/64, (D) 5/64, (E) 3/64 My flawed solu...

by AndreiGMAT

Wed Apr 27, 2016 10:42 pm
Forum: Problem Solving
Topic: Probability - What's Wrong?
Replies: 6
Views: 2194

Issue with wording

Plz help to interpret the wording from OG Review. A closed cylindrical tank contains 36Ï€ cubic feet of water and is filled to half its capacity. When the tank is placed upright on its circular base on level ground, the height of the water in the tank is 2 feet. When the tank is placed on its side o...

by AndreiGMAT

Mon Apr 25, 2016 3:36 am
Forum: Problem Solving
Topic: Issue with wording
Replies: 2
Views: 1019