Search found 48 matches
Hi NeilWatson, Looking at (1) we know that N is divisible by 14 and 35. If a number is divisible by 14, it's divisible by both 2 and 7 If a number is divisible by 35, it's divisible by both 5 and 7 Since N is divisible by 2 and by 5, it has to be divisible by 2*5 = 10, and therefore must end with a ...
- by dimochka
Tue Feb 18, 2014 9:22 pm- Forum: Data Sufficiency
- Topic: What would be the quickest way to solve this?
- Replies: 2
- Views: 1117
Hi jroach31, Yes, you can add equations, multiply them, or do anything else to them, as long as you're doing the same thing to each side. Essentially you are working with some statements A,B,C,D, where A=B and C=D. So if A=B, A*C = B*C. But since C=D, you can also write it as A*C = B*D. Looking at t...
- by dimochka
Tue Feb 18, 2014 9:15 pm- Forum: Problem Solving
- Topic: Combining equations
- Replies: 3
- Views: 1617
GMATGuruNY's thought process is the exact one I used to solve this. If you write these out next to each other you can see that: A = 35% cement, 40% sand, 25% gravel B = 15% cement, 30% sand, 55% gravel As you're looking for 25% cement, you would need an equal amount of A and B, as (35+15)/2 = 25. Th...
- by dimochka
Tue Feb 18, 2014 8:48 am- Forum: Problem Solving
- Topic: Percentage Problem
- Replies: 31
- Views: 18058
Hi safina, The question essentially asks - is -1<x<1 (excluding 0)? Choice A: the left hand side will be 1 when x>0 and -1 when x<0. Let's look at the possibilities: x>1 --> Statement will be TRUE because left hand side is 1 whereas x>1. 0<x<1 --> Statement will be FALSE because left hand side is 1 ...
- by dimochka
Fri Feb 14, 2014 10:30 am- Forum: Data Sufficiency
- Topic: Inequalities
- Replies: 6
- Views: 1923
As there is no answer choice that will encompass all of the possible solutions for x, the question is asking you to pick the portion that will definitely include a range that is fully composed of possible solutions for x, but does not necessarily include every single answer for x. So, for example, a...
- by dimochka
Thu Jan 23, 2014 10:33 am- Forum: Problem Solving
- Topic: If x^3 < 16x which of the following includes
- Replies: 2
- Views: 1251
Sorry for replying 1.5 years later, but I figured I'd respond for anyone else looking at this for insight. Yes, I would definitely have to say that over the course of your studying, you should be able to relate a large number of questions to practice problems you've done in the past. As a matter of ...
- by dimochka
Thu Jan 23, 2014 10:12 am- Forum: I just Beat The GMAT!
- Topic: 700 to 750 to 770
- Replies: 10
- Views: 10084
The way I would solve this question is break the pieces down into separate parts: Part 1: The first 10 minutes will cost $2.50 Part 2: The next 10 minutes will cost $1.50 We have now used up 20 minutes which cost us $4.00 The remaining 55 minutes will be charged at $0.10 per 20 seconds. We have 55*3...
- by dimochka
Thu Jan 23, 2014 8:55 am- Forum: Problem Solving
- Topic: Long distance phone call
- Replies: 2
- Views: 1161
I'm trying to put together the actual solution to find AD just for reference, but regardless the below question can be solved without doing that (and you should aim to solve similar questions without finding the actual answer, but rather just find out if it can be solved) We have a triangle with ess...
- by dimochka
Wed Jan 22, 2014 8:59 am- Forum: Data Sufficiency
- Topic: geomatry
- Replies: 3
- Views: 1602
First I'd like to say that this question is not a very nice one. Regardless, let's go through this. A. One of the biggest problems with this choice is that if we are using an "ing" verb, these will be actions performed by the farmer as a result of keeping them cool or in order to keep them...
- by dimochka
Tue Jan 21, 2014 8:19 pm- Forum: Sentence Correction
- Topic: GMAT Prep -Holstein Cows
- Replies: 3
- Views: 1444
First off, because you have a 3-4-5 triangle as the base, you know that your triangle is right and has an area of 3*4/2 = 6. Since your total volume is 30, the height of the solid is therefore 30/6 = 5. Now just count up the areas of the surfaces: Bottom base: 6 (as determined above) Top base: 6 (sa...
- by dimochka
Tue Jan 21, 2014 9:51 am- Forum: Problem Solving
- Topic: Total surface area
- Replies: 3
- Views: 1190
Spoilered below. [spoiler]Choice A is a fragment (no active verb related to the action of the archaeologist) Choice B is a run on sentence with alternative passive/active voice, and with "they" referring back to the ship, which does not make much sense. Choice C is fine and likely the corr...
- by dimochka
Tue Jan 21, 2014 9:23 am- Forum: Sentence Correction
- Topic: Henry VIII artifacts
- Replies: 2
- Views: 2283
Hi AnjaliOberoi, The way to discount D as the wrong answer is to read past the underlined portion. Note that the incorrect choice makes it seem that the phrase "in a vase" describes the garden. Instead, it should be describing the process of arraging or the arrangement itself. Essentially,...
- by dimochka
Tue Jan 21, 2014 7:52 am- Forum: Sentence Correction
- Topic: Flowers
- Replies: 2
- Views: 1207
Hi AnjaliOberoi,
The reason the OA is not E is because you need to keep the verbs parallel. As the previous verbs describing the Rep's potential actions are single out and begin, the following verb needs to be in the same format: impose.
- by dimochka
Tue Jan 21, 2014 7:45 am- Forum: Sentence Correction
- Topic: Section 301
- Replies: 3
- Views: 1544
The more generic formula would be x*(n-1), where x is the difference between each chronological pair of numbers in the set. The 1st number is A The 2nd number is A+x The 3rd number is A+x*2 The 4th number is A+x*3 The nth number is A+x*(n-1) In this question we are dealing consecutive odd integers, ...
- by dimochka
Tue Jan 21, 2014 7:34 am- Forum: Data Sufficiency
- Topic: OG DS #66
- Replies: 6
- Views: 4502
The way to solve it is to follow order of operations. I've detailed out each step below.
36 + 9 = 45
6(36 + 9) = 6 * 45 = 270
6(36 + 9)/1 = 270 / 1 = 270
6(36 + 9)/1/4 = 270 / 4 = 67.5
80 - 6(36 + 9)/1/4 = 80 - 67.5 = 12.5
- by dimochka
Fri Jan 17, 2014 10:46 am- Forum: Problem Solving
- Topic: BODMAS
- Replies: 4
- Views: 1567