Search found 410 matches
dear friends, please help, HELP, HELP To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility. (A) have to know a great deal more than now about the social and economic (B) have to know a great deal ...
- by OptimusPrep
Wed Jul 20, 2016 8:13 pm- Forum: Sentence Correction
- Topic: SC- comparison
- Replies: 2
- Views: 1268
Distinguished architecture requires the expenditure of large sums of money, even if it is by no means certain that the expenditure of large sums of money produce distinguished architecture. (A) even if it is by no means certain that the expenditure of large sums of money produce (B) even if it is b...
- by OptimusPrep
Wed Jul 20, 2016 8:05 pm- Forum: Sentence Correction
- Topic: PLATINUM GMAT MOCK SC.. why not C?
- Replies: 1
- Views: 1162
Often patients with ankle fractures that are stable, and thus do not require surgery, are given follow-up x-ray because their orthopedists are concerned about possibly having misjudged the stability of the fracture. When a number of follow-up x-rays were reviewed, however, all the fractures that ha...
- by OptimusPrep
Mon Jul 18, 2016 8:51 pm- Forum: Critical Reasoning
- Topic: Often patients with ankle fractures that are stable,
- Replies: 3
- Views: 2086
If k is an integer and x(x – k) = k + 1, what is the value of x? (1) x < k (2) x = 3 – k Given: x(x-k) = k + 1 x^2 - xk -k - 1 = 0 x^2 - 1 -k(x+1) = 0 (x-1)(x+1) - k (x+1) = 0 (x+1)(x-1-k) = 0 - (i) Hence x = - 1 or x = 1+k Required: x = ? Statement 1: x < k From this, we can say that ≠k+1 H...
- by OptimusPrep
Mon Jul 18, 2016 8:39 pm- Forum: Data Sufficiency
- Topic: Tricky DS Question
- Replies: 7
- Views: 1859
Hi all, I've just recently started studying for my GMAT and have been averaging about 1.5-2 hours per day after work plus some full days on Fridays, Saturdays and Sundays. I'm currently at about a 530 score and would like to get up to 600-650 but I am having a really hard time with the quant sectio...
- by OptimusPrep
Mon Jul 18, 2016 8:24 pm- Forum: GMAT Math
- Topic: Math Help
- Replies: 6
- Views: 3929
Hi, After doing my research over the past 2 days, I have narrowed down my main prep course to either Veritas or Manhattan Prep. Reviews on both have been stellar, though it seems like Veritas slightly edges out the other when it comes to the sheer number of customer feedbacks, Veritas also seem to ...
- by OptimusPrep
Mon Jul 18, 2016 8:22 pm- Forum: GMAT Strategy
- Topic: Another One of Those... Veritas or Manhattan
- Replies: 2
- Views: 2530
Hi all, Does XY=X^2? 1)Y^2-XY=0 2)X^2-2XY+Y^2=0 For question stem I concluded as "is X=Y?" and Item 1: Y^2-XY=0 ==> Y^2=XY which means X=Y Sufficient. Am I right? Always remember in case of variables: take common out, never divide. You can write statement 1 as y(y - x) Hence you will have...
- by OptimusPrep
Sun Jul 17, 2016 8:57 pm- Forum: Data Sufficiency
- Topic: Data Sufficiency : Does XY=X^2?
- Replies: 4
- Views: 2224
Is n an integer? 1) n^2 is an integer. 2) under root n is an integer. OA B Please explain. Required: Is n an integer? Statement 1: n^2 is an integer If n = 2, n^2 = 4 If n = √2, n^2 = 2 INSUFFICIENT Statement 2: √n is an integer. If √n is an integer, then (√n)^2 = n This will also be an int...
- by OptimusPrep
Sun Jul 17, 2016 8:54 pm- Forum: Data Sufficiency
- Topic: Is n an integer
- Replies: 3
- Views: 1495
In a certain business, production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i. What is p if i=70? 1) e=0.5 whenever i=60 2) p=2.0 whenever i=50 OA B Please explain. Given: p = c1*e - (i) where c1 is a constant and e = c2*i - (...
- by OptimusPrep
Sun Jul 17, 2016 8:50 pm- Forum: Data Sufficiency
- Topic: What is p if i=70?
- Replies: 3
- Views: 1291
You can write 384 as 128*3 or 2^7*3sushil hande wrote:HCF of 384 & a^5b^2 is 16ab.what is the correct relation between a and b?
The HCF of 2^7*3 and a^5b^2 = 16ab would contain the highest powers of the common multiples.
You can try solving ahead with this.
Let me know if this helps.
- by OptimusPrep
Sun Jul 17, 2016 8:43 pm- Forum: Problem Solving
- Topic: HCF
- Replies: 5
- Views: 4967
Hi everyone, so I took the GMAT last week and scored a 360, absolutely no where near I wanted to be. I need a 450+ to apply to my graduate school program. I am retaking the exam in the beginning of August and need a lot of help studying for math and verbal. I need specifically a study plan on what ...
- by OptimusPrep
Sun Jul 17, 2016 8:39 pm- Forum: GMAT Math
- Topic: Need advice and help now!
- Replies: 8
- Views: 3805
Fortunately no.Abhey Kharbanda wrote:Hi guys, does the GMAT ask questions on base system?
For example: how would you write 2234 in base 4 to a number in base 7?
And even if you are asked one, you would be told in the question itself how to change from one base to another and then the question would be asked.
- by OptimusPrep
Sun Jul 17, 2016 8:37 pm- Forum: GMAT Math
- Topic: Questions on base system
- Replies: 14
- Views: 7222
Hi I have scheduled my GMAT in the last week of August and am currently taking practice tests to get comfortable with timing and to build mental stamina. I took 1st GMAT preptest couple of months back and scored 720. I have completed OG review now and currently going through OG verbal review. I too...
- by OptimusPrep
Sun Jul 17, 2016 8:15 pm- Forum: GMAT Verbal & Essays
- Topic: Kaplan Premiere Practice Tests difficulty
- Replies: 2
- Views: 4714
Q. A bag contains 3 red, 4 black and 2 white balls. What is the probability of drawing a red and a white ball in two successive draws, each ball being put back after it is drawn? (A) 2/27 (B) 1/9 (C) 1/3 (D) 4/27 (E) 2/9 3R, 4B, 2W balls. P(1R, 1W) = (3/9)*(2/9) = 1/3*2/9 = 2/27 Now the Red and the...
- by OptimusPrep
Sat Jul 16, 2016 11:43 am- Forum: Problem Solving
- Topic: Probability
- Replies: 3
- Views: 1190
Hi, I was going through Parallelism topic.Can someone please explain to me,the usage of comma here: WRONG: She argues that the agency acts with disregard for human life and property and reckless abandon and it should therefore be shut down . RIGHT: She argues that the agency acts with reckless aban...
- by OptimusPrep
Sat Jul 16, 2016 11:33 am- Forum: Sentence Correction
- Topic: Parallelism
- Replies: 1
- Views: 898