Search found 103 matches
Three Overlapping Sets - Equation
Hello, I know how to do the following using Venn diagrams. Just wondering why doesn't the following equation (that I have seen being recommended multiple times) not work? Equation is: Total = Group1 + Group2 + Group3 - (Sum of 2 group overlaps) - 2*(Sum of three group overlaps) + Neither Problem: Th...
- by topspin360
Sun Oct 13, 2013 8:42 am- Forum: Problem Solving
- Topic: Three Overlapping Sets - Equation
- Replies: 1
- Views: 1055
Is x^3 > x^2 ? (1) x > 0 (2) x^2 > x Since x³ > x² only if x≠0, we can rephrase the question stem by dividing by x², which must be a POSITIVE value: x³/x² > x²/x² x > 1. Question rephrased: Is x>1? Statement 1: x>0 Since it's possible that x=1/2 or that x=2, INSUFFICIENT. Statement 2: x^2 ...
- by topspin360
Sat Oct 12, 2013 2:19 pm- Forum: Problem Solving
- Topic: Inequalitites question
- Replies: 3
- Views: 1129
Inequalitites question
Hi All, I know how to solve the following intuitively. But I'm trying to solve it algebraically. x^3 > x^2? Using algebra, I simplify the question and end up with: x<0 OR x>1? Which is obviously wrong. Can someone please show me how to simplify it using algebra? Just FYI, answer choices are: 1) x > ...
- by topspin360
Sat Oct 12, 2013 10:05 am- Forum: Problem Solving
- Topic: Inequalitites question
- Replies: 3
- Views: 1129
Remainders
Can someone please thoroughly explain the logic behind this problem. 17. A number when divided by another number leaves a remainder of 24. When twice the original number is divided by the same divisor, the remainder is 11. What is the value of the divisor? (A) 13 (B) 59 (C) 35 (D) 37 (E) 12 D Thanks!
- by topspin360
Sat Feb 02, 2013 10:15 am- Forum: Problem Solving
- Topic: Remainders
- Replies: 4
- Views: 1249
arithmetic means
can someone please explain how to solve the following... Each employee on a task force is either a manager or a director. What percentage of the employees on the task force are directors? (1) Arithmetic mean salary of the managers on the task force is $5000 less than the average salary of all employ...
- by topspin360
Tue Jan 15, 2013 4:01 am- Forum: Data Sufficiency
- Topic: arithmetic means
- Replies: 2
- Views: 1012
because isn't "to avoid.." part an adverb that modifies "mastering"? I just think that adding a comma seems to turn it into an independent sentence but without a conjunction, which makes it a run-on sentence.
- by topspin360
Sun Jan 06, 2013 1:55 pm- Forum: Sentence Correction
- Topic: Infinitives as adjectives and commas
- Replies: 4
- Views: 1357
Geometry: Perimeter of a triangle vs that of a square
Can someone please explain how you'd go about tackling this question? Question: Is the perimeter of a triangle T greater than the perimeter of square S? 1) The length of the longest side of T is twice the length of a side S. 2) T is isoceles. I assume you start by picking a variable for either the s...
- by topspin360
Thu Jan 03, 2013 7:32 pm- Forum: Data Sufficiency
- Topic: Geometry: Perimeter of a triangle vs that of a square
- Replies: 3
- Views: 1628
Infinitives as adjectives and commas
i everyone, quick question regarding the sentence below. Experts suggest that, while preparing for the GMAT, one spend as much time on brushing up the fundamentals as on mastering the advanced concepts, to avoid any surprises in the end. Is the placement of the comma after "concepts" corre...
- by topspin360
Wed Jan 02, 2013 9:48 pm- Forum: Sentence Correction
- Topic: Infinitives as adjectives and commas
- Replies: 4
- Views: 1357
Jerry knows it is futile to convince his wife to buy the beach house because she is neither fond of swimming nor does she like to surf A) she is neither fond of swimming nor does she like to surf B) she is neither fond of swimming nor of surfing C) she is neither fond of swimming nor surfing D) nei...
- by topspin360
Wed Dec 26, 2012 10:38 am- Forum: Sentence Correction
- Topic: neither X nor Y parallelism
- Replies: 3
- Views: 1590
neither X nor Y parallelism
Jerry knows it is futile to convince his wife to buy the beach house because she is neither fond of swimming nor does she like to surf A) she is neither fond of swimming nor does she like to surf B) she is neither fond of swimming nor of surfing C) she is neither fond of swimming nor surfing D) neit...
- by topspin360
Mon Dec 24, 2012 3:32 pm- Forum: Sentence Correction
- Topic: neither X nor Y parallelism
- Replies: 3
- Views: 1590
arithmetic problem
can anyone suggest the most efficient way of doing this problem? OR, more importantly, GMAT arithmetic in general.. any resources I can use to get better at it? Which of the following expressions has the greatest value? A) 0.456 B) 1/2 − (1/2)^4 C) 300/650 D) 3*(3/19) E) sqrt(0.17) Please let me k...
- by topspin360
Mon Dec 24, 2012 1:49 pm- Forum: Problem Solving
- Topic: arithmetic problem
- Replies: 8
- Views: 2605
Combinations Problem
Problem: Possible arrangements for the word REVIEW if one E can't be next to the other. Answer is: 6!/2!. I understand how this is done. I thought 6! - 5! should also work but don't understand why it doesn't. 'Total combinations' - 'Combinations where two Es are together' would give us 6! - 5!. Can ...
- by topspin360
Sat Dec 22, 2012 10:10 am- Forum: Problem Solving
- Topic: Combinations Problem
- Replies: 3
- Views: 1281
- by topspin360
Thu Dec 20, 2012 1:20 pm- Forum: Critical Reasoning
- Topic: Tought CR Problems Resources
- Replies: 1
- Views: 846
Tought CR Problems Resources
Can someone please suggest some tough practice problem sources? I am doing fairly well on CR but just want to practice with 700+ questions at this point.
- by topspin360
Tue Dec 18, 2012 2:30 pm- Forum: Critical Reasoning
- Topic: Tought CR Problems Resources
- Replies: 1
- Views: 846
Probability
Hello, I understand how to do the original question but can you please explain how to solve my version of the question (posted underneath the question below). If there are 30 red and blue marbles in a jar, and the ratio of red to blue marbles is 2:3, what is the probability that, drawing twice, you ...
- by topspin360
Tue Dec 18, 2012 2:30 am- Forum: Problem Solving
- Topic: Probability
- Replies: 2
- Views: 1178