Search found 159 matches
Re: sequence
4. Sequence s1,s2,s3,..sn, is such that s=1/n-1/n+1 . Is the sum of first n terms greater than 9/10? 1). n>10 2). n<19 s1+s2+s3+s4...+sn > 9/10 ? s = (1/n) - (1/n+1) we can see that s1's second term will cancel with s2's second term so in the summation, s1+s2+s3+s4...+sn only (1)-(1/n+1) will remai...
- by aroon7
Sun Feb 01, 2009 9:44 am- Forum: Data Sufficiency
- Topic: sequence
- Replies: 1
- Views: 1059
I got this question in yesterday's test
the sequence is:
1,-3,2,5,-4,-6
ildude02 did a typo...
so the answer is 3
- by aroon7
Sun Feb 01, 2009 8:53 am- Forum: Problem Solving
- Topic: hard time understadning the question
- Replies: 15
- Views: 5036
Ian Stewart wrote:Yeah, that's a typo in some versions of GMATPrep. It is supposed to say:
3^(4n+2) + m
I hope there are no typos in real exam
- by aroon7
Sat Jan 31, 2009 7:08 pm- Forum: Problem Solving
- Topic: Mistakes in Gmat Prep??
- Replies: 2
- Views: 1324
Re: GMATPREP Jacobi
[She was less succesful after she had emigrated to New York compared to] her native Germany, photographer Lotte Jacobi nevertheless earneda small group of discerining admirers, and her photographs were eventually exhibited in prestigious galleries across the US. a b Being less sucessful after she h...
- by aroon7
Sat Jan 31, 2009 6:11 pm- Forum: Sentence Correction
- Topic: GMATPREP Jacobi
- Replies: 6
- Views: 2946
But when you measure it, you'll get sqrroot 3 for x, right? P and Q are in the same distance. Y is same. I don't understand the logic. Can you please explain me? A really tricky one... pl refer diagram in attachment we have, angle AOB = 90 OD = sqrt(3) AD = 1 so, triangle OAD is right triangle with...
- by aroon7
Sat Jan 31, 2009 5:29 pm- Forum: Problem Solving
- Topic: What is the value of s?
- Replies: 9
- Views: 7827
is it possible to draw a right traingle such that diameter is not one of the sides of the triangle?? If you're referring to triangles in circles in general, the anwer is no. See: http://www.postimage.org/PqVTcIr.jpg Then, why is A insufficient for this problem... if the angle subtended by the chord...
- by aroon7
Sat Jan 31, 2009 4:28 pm- Forum: Data Sufficiency
- Topic: Geometry - triangle in a circle
- Replies: 9
- Views: 2275
is it possible to draw a right traingle such that diameter is not one of the sides of the triangle?? If you're referring to triangles in circles in general, the anwer is no. See: http://www.postimage.org/PqVTcIr.jpg Then, why is A insufficient for this problem... if the angle subtended by the chord...
- by aroon7
Sat Jan 31, 2009 4:20 pm- Forum: Data Sufficiency
- Topic: Geometry - triangle in a circle
- Replies: 9
- Views: 2275
- by aroon7
Sat Jan 31, 2009 3:43 pm- Forum: Problem Solving
- Topic: Mistakes in Gmat Prep??
- Replies: 2
- Views: 1324
Re: Reshma Salma and Mandip on a circle
Three girls Reshma Salma and Mandip are playing a game by standing on a circle of radius 5m drawn in a park. Reshma throws a ball to Salma, Salma to Mandip and Mandip to Reshma. if the distance between Reshma and Salma and between Salma and Mandip is 6m each, what is the distance between Reshma and...
- by aroon7
Sat Jan 31, 2009 12:01 pm- Forum: Problem Solving
- Topic: Reshma Salma and Mandip on a circle
- Replies: 9
- Views: 5694
- by aroon7
Sat Jan 31, 2009 11:38 am- Forum: Sentence Correction
- Topic: Adding words to a sentence in SC?
- Replies: 5
- Views: 1491
Hoe does it change the meaning and in what sence is it awkward.. The report concludes only one thing: many of uncontrolled dioxins affect amesricans comes from... but choice D has an AND so it would mean that report concludes 2 points: 1) many of the dioxins that are currently uncontrolled and 2) N...
- by aroon7
Sat Jan 31, 2009 10:16 am- Forum: Sentence Correction
- Topic: SC 1000 - series question
- Replies: 4
- Views: 1751
Here is what i did:
selecting 2 black socks = 5C2
selecting remaining socks = 8C2 (2 socks already selected out of 10. so 8 socks remain and we need to pick 2 out of these 8)
prob = 5C2 * 8C2 / 10C4 = 280/210 
this is greater than 1
some one please help me...
- by aroon7
Sat Jan 31, 2009 9:36 am- Forum: Problem Solving
- Topic: Probability - selecting socks
- Replies: 11
- Views: 1927
- by aroon7
Sat Jan 31, 2009 9:19 am- Forum: Problem Solving
- Topic: Probability - selecting socks
- Replies: 11
- Views: 1927
This is what I calculated before... but since I didnt find the answer choice, i thought 'between A and B" would mean A comes before B...Brent Hanneson wrote:Right you are.
The answer is E.
Thanks for the question Bernt.
- by aroon7
Sat Jan 31, 2009 9:10 am- Forum: Problem Solving
- Topic: Counting - seating 7 people
- Replies: 7
- Views: 1494
ans is E we need A X X B X X X X can be occupied by others A = Al B = Bea we can shift the arrangement A X X B four times: A X X B X X X X A X X B X X X X A X X B X X X X A X X B and other places can be occupied by 5*4*3*2*1 = 120 so total arrangements = 4*120 = 480 Sorry, aroon7 - my original set ...
- by aroon7
Sat Jan 31, 2009 9:05 am- Forum: Problem Solving
- Topic: Counting - seating 7 people
- Replies: 7
- Views: 1494