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Zarrolou
Replies:
3
Views:
677
Thanks:
1
1. w+2 >0 then w> -2 Not sufficient
2. w^2 > 1 then w >1 or w < -1. Not sufficient

Combining 1 & 2, we get -2 < w < -1 OR w>1.(<-you missed this interval)

E as yo ...
Zarrolou
Replies:
2
Views:
1692
Thanks:
0

need help---- OG 13, PS - 196

Forum:
GMAT Math
Posted:
Wed Apr 17, 2013 3:31 pm
The least possible value should be as big as possible and negative.

The biggest value is obtain through the moltiplication of the biggest values (-10,10)
If we pick -10 x20 times however the resu ...
Zarrolou
Replies:
4
Views:
924
Thanks:
0

Absolute value sum

Forum:
Problem Solving
Posted:
Tue Apr 16, 2013 2:10 am
|a-b| can have 2 values:
1)a>b a-b>0
a-b=b-a

2)a<b
-a+b=b-a

As you can see in case 2 the equality is true. So if we know that
|a-b|=b-a
we must be in the second case.

keep in m ...
Zarrolou
Replies:
4
Views:
684
Thanks:
0

Percentage problem

Forum:
Problem Solving
Posted:
Fri Apr 12, 2013 11:33 pm
P*(85/100)=68$ [85/100 means 15% discount]
P=80$ original price

Final price = P*(85/100)*(125/100)=68*(125/100)=85$

Difference = 85-80 = 5$
Zarrolou
Replies:
2
Views:
618
Thanks:
2

exponents and Power

Forum:
Problem Solving
Posted:
Fri Apr 12, 2013 2:12 pm
Basically the question asks how many 5*2 there are in N, so that N is divisible by (5*2)^m
The problem now comes down to how many 5s there are in N, because clearly the number of 2s will be greater s ...
Zarrolou
Replies:
6
Views:
1475
Thanks:
0

2^5+2^5+3^5+3^5+3^5=?

Forum:
Problem Solving
Posted:
Fri Mar 15, 2013 3:41 pm
2^x-2^(x-2)=3(2^13) x=?

I can take this:

2^x(1-2^(-2))=3*(2^13)
2^x(1-1/4))=3*(2^13)
2^x(3/4)=3*(2^13)

The first part:
2^x(3/4) = 2^x(3/(2^2)) = 3*(2^x/2^2) = 3*2^(x-2)
I hope the last pa ...
Zarrolou
Replies:
4
Views:
751
Thanks:
0

Average

Forum:
Data Sufficiency
Posted:
Fri Mar 15, 2013 3:30 pm
a+b+c+d+e>=150

If a,b,c,d,e each is multiple of 10; the least sum of 5 different integers, multiples of 10, is:

0+10+20+30+40=100

Statement 1 is not sufficient.

(check this http://www.b ...
Zarrolou
Replies:
2
Views:
523
Thanks:
0

Verb Tense Question

Forum:
Sentence Correction
Posted:
Fri Mar 15, 2013 3:22 pm
In this sentence there is an action that goes on in the past, for a long period of time; then there is another action that "stops" it.
This first one requires a Past Perfect, the second req ...
Zarrolou
Replies:
1
Views:
562
Thanks:
0

SC Question

Forum:
Sentence Correction
Posted:
Wed Mar 13, 2013 12:33 pm
IMO A

b) by skimming along the top of the atmosphere, proponents of a proposed new style of aircraft say it could fly between most points on Earth in under 2 hours
"by skimming" refers t ...
Zarrolou
Replies:
8
Views:
879
Thanks:
0

Innside Holiday group of hotels

Forum:
Critical Reasoning
Posted:
Tue Mar 12, 2013 4:16 am
IMO B.
All of the following, if true, explain the rise in revenues of Innside Holiday, EXCEPT:
B. The Innside Holiday Group's revenues from its restaurant and spa increased after its transformation ...
Zarrolou
Replies:
6
Views:
5248
Thanks:
0

Weight of discus

Forum:
Sentence Correction
Posted:
Mon Mar 11, 2013 11:22 pm
maybe C
Zarrolou
Replies:
4
Views:
750
Thanks:
0

SC: GMAT Prep question

Forum:
Sentence Correction
Posted:
Mon Mar 11, 2013 7:49 am
"because of diminishing" is wrong, out B and E.
"respiratory system in dealing" is unidiomatic, out C.
We are down to A and D:
A. an especially serious pollutant because it dimi ...
Zarrolou
Replies:
5
Views:
1092
Thanks:
0

Babblers Syndrome

Forum:
Critical Reasoning
Posted:
Sun Mar 10, 2013 6:31 am
FACT: people suffering from this syndrome consumed dairy products in large quantities.
CONCLUSION: to avoid B.S. reduce consumption of dairy products

The study's conclusion is based on which of t ...
Zarrolou
Replies:
9
Views:
3768
Thanks:
0

Inequality Problem : 10 seconds solution requested

Forum:
Problem Solving
Posted:
Sun Mar 10, 2013 12:00 am
The answer is D.

|-5+x|<4
-5+x>=0, x>=5
So we can split the absolute value in 2 cases:
1)Condition: x>=5 (x is positive)
-5+x<4 x<9
2)Condition: x<4 (x is negative)
+5- ...
Zarrolou
Replies:
2
Views:
1476
Thanks:
0

strengthen the argument

Forum:
Critical Reasoning
Posted:
Thu Mar 07, 2013 11:11 pm
FACT 1: income of the poor has increased 6%.
FACT 2: income of the others has increased 13%.

CONCLUSION: standard living conditions have not improved.
We are looking for an answer that supports t ...
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