Search found 109 matches
- by jeffedwards
Wed May 26, 2010 6:55 pm- Forum: Let's Meet Up
- Topic: Salt Lake City, Utah
- Replies: 2
- Views: 2154
The question is is 2a<b Can we really assume the question is asking if 2a<b? We don’t know if a or b is negative or not, so when we divide or multiply by one of the variables, we don’t know if we would need to flip the sign or not…right For example a/b < ½ 4/-2 < ½ This statement is true, b...
- by jeffedwards
Wed May 26, 2010 9:24 am- Forum: Data Sufficiency
- Topic: Inequality
- Replies: 9
- Views: 1753
In the 1980’s the rate of increase of the minority population of the United States was nearly twice as fast as the 1970’s. (A) twice as fast as (B) twice as fast as it was in (C) twice what it was in (D) two times faster than that of (E) two times greater than plz explain the answer IMO – C A...
- by jeffedwards
Tue May 25, 2010 7:55 pm- Forum: Sentence Correction
- Topic: twice problem
- Replies: 8
- Views: 1232
The way I solved this problem was by finding numbers that could gives us a true or a false. Since we cannot resolve a definite solution, the answer is E - cannot solve combined . I wrote examples of fractions that would work…just subtract one from the bottom, top, or both depending on the part and...
- by jeffedwards
Tue May 25, 2010 7:45 pm- Forum: Data Sufficiency
- Topic: Inequality
- Replies: 9
- Views: 1753
[spoiler]1/3[/spoiler] Just pick easy numbers First stone weighs 9 pounds. We’re going to use dollars for the amount to make it easy too 9^2 = $81 Now divide the original weight for each individual stone 9/3=3 3^2= $9 So the original was worth $81 The new stones are each worth $9 Now add the value...
- by jeffedwards
Tue May 25, 2010 7:25 pm- Forum: Problem Solving
- Topic: precious stone
- Replies: 3
- Views: 3070
Hello there! can you please elaborate here , how did u break down 3^6x = 8100 into 3^3x = 90 3^(3x-3)= 90/3^3 =10/3 thanks :) mitzwillrockgmat, hope this breakdown is understandable 3^6x = 8100 (3^3x)^2 = 8100 (pulled the 2 out of the left side to make visible) (3^3x)^2 =90^2 (made the right side s...
- by jeffedwards
Tue May 25, 2010 7:10 pm- Forum: Problem Solving
- Topic: If 3^6x = 8,100, what is the value of [(3^x – 1)]^3 ?
- Replies: 11
- Views: 11907
First let’s look at the question x^5 = We need to know the value of x, including if it’s negative or positive, because x^5 will change depending on if x is negative or positive 1- Tells us x could be 3 or -3 2- Tells us that x is around 2.1 or higher and that it is positive (positive is key) Nei...
- by jeffedwards
Mon May 24, 2010 12:46 pm- Forum: Problem Solving
- Topic: What is the value of x^5 ? (1)x^2 = 9 (2) x^3 > 9
- Replies: 3
- Views: 1122
What is the OA? I got [spoiler]D- 2/5[/spoiler] The way I went about doing this is as follows. The person drawing could pick any number 2-6 inclusive (to add up to 8). Then I listed the possible combos assuming the numbers add up to 8. For each number there is only one other number that the person c...
- by jeffedwards
Mon May 24, 2010 12:32 pm- Forum: Problem Solving
- Topic: Six cards numbered from 1 to 6 are placed in an empty bowl.
- Replies: 5
- Views: 8189
- by jeffedwards
Fri May 21, 2010 10:48 am- Forum: Critical Reasoning
- Topic: automobile
- Replies: 4
- Views: 3000
I also agree – IMO A
The passage states that, “it is ironic that the innocent passenger should suffer for the driver’s carelessness�.
It sounds like the assumption is that in such accidents the accident is the drivers fault not the passenger’s.
- by jeffedwards
Fri May 21, 2010 10:47 am- Forum: Critical Reasoning
- Topic: automobile
- Replies: 4
- Views: 3000
will you explain to me how you got 9C2? just trying to understandclock60 wrote:hi
we can vary it
and the total number of outcomes will looks like
9!/(7!*2!)=36
- by jeffedwards
Thu May 20, 2010 11:34 am- Forum: Problem Solving
- Topic: number of trees
- Replies: 12
- Views: 1972
why B is wrong ? 'as of this morning' seems to indicate the past event. so 'was' should be the right choice instead of 'has' you’re right it is in the past, but there is a trigger to let you know what tense to use. The sentence says “as of this morning� that triggers Past Perfect Simple…(ac...
- by jeffedwards
Wed May 19, 2010 3:57 pm- Forum: Sentence Correction
- Topic: none of my friends
- Replies: 25
- Views: 8345
Does that mean, we need to solve it in the reverse order (i.e. by considering the root) rather than substituting for y, coz cube of any integer, undoubtedly, will be an integer!! Good point, first you proved that it could be possible, but then you want to see if you can disprove it. Is there a non-...
- by jeffedwards
Wed May 19, 2010 11:00 am- Forum: GMAT Math
- Topic: Data Sufficiency
- Replies: 6
- Views: 1727
you were mostly all on...i do that all the timeindiantiger wrote:@ jeffedwards,
Thanks for the correction, it has been a long day
![Smile :)](./images/smilies/smile.png)
- by jeffedwards
Wed May 19, 2010 10:54 am- Forum: Problem Solving
- Topic: PERCENT TEST
- Replies: 8
- Views: 1509
I think there should be a better method than this one do this question but anyways: population in 1950 = 810 we need to find the year of population 160 Lets say the year was 19xx and population = 160 population increases by 1/2 of the previous population every year so in 19xx+1, population was = 16...
- by jeffedwards
Tue May 18, 2010 4:31 pm- Forum: Problem Solving
- Topic: PERCENT TEST
- Replies: 8
- Views: 1509