Search found 34 matches


Are you located in USA? My GMAT exam is this friday and if I get a respectable score, I would be happy to send you my books for free. I have MGMAT books and Kaplan book. You should try looking on Craigslist as well. You might get lucky!! Good luck for your exam. Does anyone have any suggestions on h...

by amittilak

Tue Feb 23, 2010 1:36 pm
Forum: GMAT Strategy
Topic: Studying on a budget
Replies: 6
Views: 1472

Hi, I used following approach: Subtracting 9 from 285 gives us 276, which must be a multiple of one of the correct answer choices. Clearly, we can see that the answer must be 138. To recheck, subtract 7 from 1249, which gives us 1242. 1242 = 138 * 9 Harsh, can you please post the source for this que...

by amittilak

Wed Feb 17, 2010 4:50 am
Forum: Problem Solving
Topic: Greatest Number
Replies: 4
Views: 3308

Hi,
This is the method I use for most of the mixture problems:

20 + x = 20 + x
(5% E/95%G) (100% E) (10% E/90%G)

(5/100)*20 + x = (10/100) * (20 + x)
100 + 100x = 200 + 10x
90x = 100
x = 10/9 gal.

by amittilak

Tue Feb 16, 2010 1:16 pm
Forum: Problem Solving
Topic: Mixture
Replies: 6
Views: 2860

I think for many questions its a personal choice wether to use algebra or plug in numbers. For this problem, I would use algebra: We have consecutive odd numbers "X", with largest number "Z" Now, for evenly spaced sets, The number of terms is calculated as: X = (Z - L)/n + 1 n = ...

by amittilak

Tue Feb 16, 2010 12:21 pm
Forum: Problem Solving
Topic: Number Series
Replies: 8
Views: 2281

This is a good question for rates. Here's how I solved: R*T=D Gloria travels for 20 mins @ 12mph D = 12*20/60 = 4 miles, Which means the distance between her mother and Gloria is 4 miles. Now, the mother's speed is 36 mph, which means that she is catching up to Gloria @ 36 - 12 = 24 mph Time in minu...

by amittilak

Tue Feb 16, 2010 12:06 pm
Forum: Problem Solving
Topic: Puzzling math problem (for me anyway)
Replies: 6
Views: 1361

son of a gunn........ this is probably the best traps I have seen.. especially if you get this in questions 25 and up, when most people are running little short on time.

by amittilak

Tue Feb 16, 2010 11:50 am
Forum: Problem Solving
Topic: Tough Algebra, Can anyone help me? Thanks!!
Replies: 12
Views: 2073

Ajith, In your case 3, you have 4/10*4/11* 5/10 I think it should be, 4/10*4/11*7/10, since you are adding 1 extra red ball from Urn B to urn A. That gives us, (6*5*6+6*6*5+4*4*7+4*7*6)/(10*11*10 = 27/55 What's the OA on this? Q : Urn A contains six red and four black balls and Urn B contains four r...

by amittilak

Tue Feb 16, 2010 11:44 am
Forum: Problem Solving
Topic: Intermediate Probability
Replies: 8
Views: 1323

My approach was slightly similar to one used by another poster here. However, instead of Range, calculated the mean for all the choices and found the sets with the farthest spread from the mean. Answer choice A and D have same maximum spread from the mean. However, since Answer choice D has more num...

by amittilak

Thu Feb 11, 2010 11:35 am
Forum: Problem Solving
Topic: sd
Replies: 14
Views: 1975

Here's my 2 cents: C + D = 55 AFTER ADOPTION, MAXIMIZE, C/5 + D/4 SINCE, 1/5 < 1/4 The answer lies between, C/4 + D/4 AND C/5 + D/5 OR Between 55/4 and 55/5 or between 13.75 and 11. Now, we know that our answer has to be an integer lower than 13.75 and greater than 11. I chose 13 and did a quick bac...

by amittilak

Thu Feb 11, 2010 11:25 am
Forum: Problem Solving
Topic: Cats and Dogs
Replies: 7
Views: 2572

John,
Let me be the first to congratulate you on ur gre8 achievement!!!! best of luck fr ur applications.
AT

by amittilak

Fri Feb 05, 2010 6:28 am
Forum: I just Beat The GMAT!
Topic: Crushed the GMAT! 770, 49Q, 46V
Replies: 17
Views: 12895

Hint: If you are in a jam and don't know what symmetrical @ x=2 means, you can always use the dirty way to guess. I pictured an imaginary line from x=3 to the graph and then perpendicular to the y axis and the closest answer choice was 1. Ofcourse I would be very cautious when using this method but ...

by amittilak

Mon Feb 01, 2010 10:43 am
Forum: Problem Solving
Topic: OG 12th edition - Q # 9
Replies: 10
Views: 1727

wow.... I hate to admit this but I have my test next month and I am afraid that I may attempt the stunt of going out for a smoke...lol... On a more serious note though, I really think it would be a bad idea... I mean you really don't want to put your future on line for a smoke break. My dear fellow ...

by amittilak

Wed Jan 27, 2010 8:46 pm
Forum: GMAT Strategy
Topic: Any smokers out there?
Replies: 11
Views: 4608

money9111 wrote:Thank you amittilak I think that rule will be much easier to remember... adding that to notecards right now!
you are welcome...
I forgot to mention something in my last post. Maybe you already know this but if the slopes of the lines are equal, the lines are parallel.

by amittilak

Wed Jan 27, 2010 7:31 pm
Forum: Problem Solving
Topic: cod
Replies: 12
Views: 1891

so because of the lengths which we were able to find using the other formula... we use Pyth. Th. to recognize that it's a right triangle? Alternatively, we can find slope between points (5,4) and (2,5) and compare it with slope for line between (2,5) and (1,2). For perpendicular lines, the slope mu...

by amittilak

Wed Jan 27, 2010 12:54 pm
Forum: Problem Solving
Topic: cod
Replies: 12
Views: 1891

Given: sqrt x = 25, which equals to, sqrt (x) = 5^2 (you have to realize after looking at the answer choices that you need to find the value in terms of 5) hence, x = 5 ^4 and x^2 = 5^8 Now, lets look at what was asked: x^3 - x^2 = ?? Simplifying, x^3 - x^2 = x^2 (x - 1) = 5^8 (5^4 - 1), which happe...

by amittilak

Wed Jan 20, 2010 10:42 am
Forum: Problem Solving
Topic: If sqrt x = 25, then x^3 – x^2 = ?
Replies: 7
Views: 11334