## Search found 1030 matches

combining the two statements, x, y, z all have the same signs. x (y + z)>0 whether x,y,z are all positive or all negative

x (y + z)=> +(+)>0 or -(-)>0

hence, C

- by scoobydooby

Sun Sep 19, 2010 6:08 am- Forum: Data Sufficiency
- Topic: x y z â‰ 0, is x (y + z) â‰¥ 0?
- Replies:
**3** - Views:
**2598**

would go for B

if we negate B, the argument is weakened. so B must stand. Others are out of scope and give extraneous information

- by scoobydooby

Sat Aug 28, 2010 3:00 am- Forum: Critical Reasoning
- Topic: knewton Cr-7
- Replies:
**14** - Views:
**1949**

would go for D.

the conclusion would stand if increasing % spent on non standard treatments left less money available to spend on effective treatments

- by scoobydooby

Sat Aug 07, 2010 4:53 am- Forum: Critical Reasoning
- Topic: Tough assumption
- Replies:
**8** - Views:
**1388**

C is out of scope. we need the answer choice to strengthen the conclusion less fossil fuel is now being used due to the change to new technology C doesnt link the more use of electricity to fossil fuels. we do not know how the electricity is generated, whether by fossil fuels or by other sources- wi...

- by scoobydooby

Sat Jun 12, 2010 9:12 pm- Forum: Critical Reasoning
- Topic: Doubt in CR
- Replies:
**10** - Views:
**4734**

broad outline of the stimulus: one member of a group was found to have a negative quality, so all members in the group should be examined

only E follows the same oultine as in the stimulus: one large co. underpaid taxes, so all companies must be examined.

- by scoobydooby

Sat Jun 12, 2010 6:34 am- Forum: Critical Reasoning
- Topic: parallels the argument
- Replies:
**3** - Views:
**1481**

1)=> j and k are consecutive integers. the GCF of two consecutive integers is 1. sufficient

2) if j=k=10, GCF=10; if j=3 and k=5, GCF is 1. no unique CF obtained. not sufficient.

- by scoobydooby

Sun Jun 06, 2010 8:33 am- Forum: Data Sufficiency
- Topic: HCF
- Replies:
**3** - Views:
**1145**

Conclusion:Samuel is a bad fisherman. we need to weaken the conclusion ie, he is not a bad fisherman D shows an alternate cause for his bad performance. He had to use an experimental bait at the order of the captain. the bait may not have been effective and it caused the bad performance. so Samuel m...

- by scoobydooby

Fri Jun 04, 2010 9:13 am- Forum: Critical Reasoning
- Topic: CR's scope ques.
- Replies:
**3** - Views:
**1161**

E is good W developed the concept of Continental Drift, but he didnt explain which force caused it, so his theory was rejected. Now, new instruments have confirmed continental drift by observation, so W's theory has been accepted even if there is still no explanantion on what causes continental drif...

- by scoobydooby

Fri Jun 04, 2010 5:38 am- Forum: Critical Reasoning
- Topic: Continental drift!
- Replies:
**1** - Views:
**1456**

st 1 : n = 110K +75 n can take any value. st 2 n=100Q + 25 combining st 1 & st 2 100Q -110K =50 when Q=6,K=5 ;100Q -110K =50 finding n, 100Q+25 =625 Remainder when N divided by 10 is 5 Y cant D??? take n =325, when divided by 100 :R is 5 when divided by 110 : R is 105 take n = 425 ,when when divide...

- by scoobydooby

Sat May 08, 2010 11:58 am- Forum: Data Sufficiency
- Topic: Value of n divided by 10?
- Replies:
**7** - Views:
**2771**

would go with B

1) given T=110K, T+J+S=360K=>J+S=250K

if J=120K, S=130K then median=120K

if J=50K, S=200K, then median=110K

not sufficient

2)J=120K

if J=S=T=120K, median=120K

if T=40K, S=200K, median=120K

every other combination would yield median 120K

sufficient

- by scoobydooby

Fri May 07, 2010 12:46 pm- Forum: Data Sufficiency
- Topic: gmat pre question
- Replies:
**2** - Views:
**849**

1) and 2) are not sufficient by themselves.

together,

% change in N= G(1.04-1)- D(1.15-1)/(G-D)

=> (0.04G-0.15D)/(G-D) cannot be solved

not sufficient

hence, E

- by scoobydooby

Fri May 07, 2010 12:32 pm- Forum: Data Sufficiency
- Topic: gmat pre question
- Replies:
**2** - Views:
**715**

would go with D

1) x +1 / y = y +1 / x

=>x-y=1/x - 1/y

=>x-y=(y-x)/xy

=>x-y= -(x-y)/xy

=>xy=-1

hence statement 1 is sufficient as well

- by scoobydooby

Fri May 07, 2010 12:26 pm- Forum: Data Sufficiency
- Topic: Inequality
- Replies:
**3** - Views:
**793**

Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persua ded n more people to donate $500 each to Maryâ€™s campaign. If no one donated more than once and if there were no other donations, what was the value of n? (1) The first n people donated o...

- by scoobydooby

Fri May 07, 2010 12:17 pm- Forum: Data Sufficiency
- Topic: gmat pre question
- Replies:
**2** - Views:
**837**

a) When x is divided by 2, the remainder is 1 => x is of the form: 2k+1. possible values : 3, 5, 7, 9, 11, 13,15..... when x is divided by 3, the remainder is 0 => x is a multiple of 3. possible values: 3, 6, 9, 12, 15...... satisfying both the above conditions, possible values of x=3,9,15,21... in ...

- by scoobydooby

Fri May 07, 2010 11:55 am- Forum: Data Sufficiency
- Topic: GMAT Prep-Remainder
- Replies:
**1** - Views:
**897**

"Lake Michigan is one of the lakes that ___________ (flow/flows) through US" => would go with "flow". the verb "flow" should accord with the plural subject- "lakes". we are in fact referring to the larger group of lakes that flow through US "River X is the one of the rivers that ____________ (flow/f...

- by scoobydooby

Thu Apr 29, 2010 9:42 pm- Forum: Sentence Correction
- Topic: usage of "one of the"
- Replies:
**5** - Views:
**1069**