## Search found 90 matches

##### Gmat Prep Question - please help

If x < 0, then sqrt (-x |x|) is a. -x b. -1 c. 1 d. x e. sqrt x OA is A . Can someone please explain how to get the answer? [spoiler]My logic was the following: x = -1. Thus -(-1) = 1, and the absolute value of -1 is 1. So the sqrt (1) is 1, thus x, OA D. FUrthermore, how can it be - isn't the squar...

- by Baldini

Tue May 19, 2009 12:01 pm- Forum: Problem Solving
- Topic: Gmat Prep Question - please help
- Replies:
**4** - Views:
**1171**

Thanks a lot Bluementor.

Can I just ask how long it took you to get the OA? Is there anything you did to streamline your process (took me a long time to do this)?

thanks

- by Baldini

Mon May 18, 2009 8:24 am- Forum: Data Sufficiency
- Topic: tricky odd/even integer question
- Replies:
**10** - Views:
**6749**

I just came across this question, and got the right OA. However reading the explanation above (Cramya's in particular) I am a little confused. If n = 3, then its factors are 1 and 3 (thus it has 2 factors). So 2n = 6, and its factors are 1,3 and 2. But this does not mean that 2n is "divisible by twi...

- by Baldini

Mon May 18, 2009 5:04 am- Forum: Data Sufficiency
- Topic: GMAT Prep 2- Quant 5
- Replies:
**5** - Views:
**1219**

##### tricky odd/even integer question

If x, y and z are integers and xy + z is an odd integer, is x an even integer?

1. xy + xz is an even integer

2. y + xz is an odd integer

Could someone please explain how to get to the answer as quickly as possible?

Thanks

- by Baldini

Sun May 17, 2009 11:02 pm- Forum: Data Sufficiency
- Topic: tricky odd/even integer question
- Replies:
**10** - Views:
**6749**

Dear Lisa,

Thank you very much for your valuable feedback - 710 seems just about feasible!

Regards

Baldini

- by Baldini

Sun May 17, 2009 10:04 pm- Forum: Ask Stacy Blackman
- Topic: Please rate my prospective chances
- Replies:
**2** - Views:
**1101**

ksh,Combined Work done by A + B + C as per given data

2(1/A+1/B+1/C)=5/6+2/3+1/2 =1/2

Your equation is slightly mistaken. It should be

(1/2A+1/2B+1/2C)=1/2

2A + 2B + 2C = 2

2(A + B + C) =2

thus A + B + C = 1

- by Baldini

Sun May 17, 2009 9:20 am- Forum: Problem Solving
- Topic: GMAT Prep?? (Work Rates)
- Replies:
**14** - Views:
**8919**

##### Please rate my prospective chances

Dear Stacy, I would be interested in doing an MBA at schools such as Insead and Columbia for example. I have a GPA of 3.2 from Imperial College London (3rd top University in UK at the time) in Biology. After university I changed direction to work in business (I was no longer interested in continuing...

- by Baldini

Fri May 15, 2009 7:42 am- Forum: Ask Stacy Blackman
- Topic: Please rate my prospective chances
- Replies:
**2** - Views:
**1101**

##### x & y

If x and y are integers and 2x–y= 11, then 4x+ y cannot be:

(A) –5

(B) 1

(C) 13

(D) 17

(E) 55

OA is D . CAn someone please explain how to solve this quickly?

Thanks[/spoiler]

- by Baldini

Thu May 14, 2009 2:34 am- Forum: Problem Solving
- Topic: x & y
- Replies:
**2** - Views:
**6416**

##### Tennessee Warbler with question

Kate: The recent decline in numbers of the Tennessee warbler, a North American songbird that migrates each fall to coffee plantations in South America, is due to the elimination of dense tree cover that formerly was a feature of most South American coffee plantations. Scott: The population of the sp...

- by Baldini

Tue May 12, 2009 9:52 am- Forum: Critical Reasoning
- Topic: Tennessee Warbler with question
- Replies:
**12** - Views:
**5122**

##### |X|

If |X| is the greatest integer less than or equal to X, what is the value of |-1.6|+|3.4|+|2.7|?

Could someone please explain how to get to the OA (A)?

Thanks

- by Baldini

Wed May 06, 2009 1:21 am- Forum: Problem Solving
- Topic: |X|
- Replies:
**1** - Views:
**994**

##### Concentrations Confusion

Hi, I'm trying to brush up on my "concentration/ mixture" type questions and have come across a problem which I can not solve. It relates to two similar questions: 1. One gallon of soft drink is made of 40% orange juice and 60% water, how many additional gallons of orange juice must be mixed in to m...

- by Baldini

Thu Apr 30, 2009 5:18 am- Forum: Problem Solving
- Topic: Concentrations Confusion
- Replies:
**2** - Views:
**1218**

Thank you very much for your responses - but just to be sure, I have attached a screenshot of the original question (and will assume it was a typing error).

- by Baldini

Tue Apr 28, 2009 5:09 am- Forum: Problem Solving
- Topic: Surface area of the balloon
- Replies:
**3** - Views:
**18041**

##### Surface area of the balloon

The volume of a sphere with radius r is (4/3)πr^3 and the surface area is 4πr^3. If a spherical balloon has a volume of 972π cubic centimeters, what is the surface area of the balloon in square centimeters? (A) 324 (B) 729 (C) 243π (D) 324π (E) 729π (π = pi) OA is ...

- by Baldini

Tue Apr 28, 2009 3:40 am- Forum: Problem Solving
- Topic: Surface area of the balloon
- Replies:
**3** - Views:
**18041**

##### Old Test Paper Question

Can someone please explain how to do the problem in attachment?

OA is A.

Many thanks

- by Baldini

Mon Apr 27, 2009 4:06 am- Forum: Problem Solving
- Topic: Old Test Paper Question
- Replies:
**2** - Views:
**743**

##### Should vs Will

I just came across this question and the OA has left me slightly perturbed. When I conceive a “calculation” I can not always associate an absolute certainty that it will happen (as yogikarma correctly says). In this example the word “will” would imply an absolute certainty about the calculation's pr...

- by Baldini

Thu Apr 09, 2009 1:37 am- Forum: Sentence Correction
- Topic: 134. Canadian scientists have calculated
- Replies:
**12** - Views:
**7426**