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: 1493
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: 7250
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 b...
- by Baldini
Mon May 18, 2009 5:04 am- Forum: Data Sufficiency
- Topic: GMAT Prep 2- Quant 5
- Replies: 5
- Views: 1512
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: 7250
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: 1342
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: 9496
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: 1342
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: 6872
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: 5697
|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: 1210
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 mix...
- by Baldini
Thu Apr 30, 2009 5:18 am- Forum: Problem Solving
- Topic: Concentrations Confusion
- Replies: 2
- Views: 1562
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: 18494
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) 729	...
- by Baldini
Tue Apr 28, 2009 3:40 am- Forum: Problem Solving
- Topic: Surface area of the balloon
- Replies: 3
- Views: 18494
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: 956
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: 7864