Search found 36 matches
Re: Thanks for the response
The answer is indeed 2 but there are a few doubts 1. Choice 2 does not say that the prime no. has to be in the first thirty only. 2. It says at least on prime is there therefore it can be more than one also.. say the nos after the 31st are all primes then it is not a gamma sequence since there are ...
- by uttam.albela
Thu Oct 29, 2009 7:20 pm- Forum: Data Sufficiency
- Topic: DS ques
- Replies: 3
- Views: 1539
Re: probability!!!
Total number of ways of arranging 4 letters into 4 envelopes = 4! = 24 Now calculate the total number of ways of required arranging that is one correct and 3 incorrect. One correct can be chosen in 4C1=4 ways 3 incorrect with 3 letters and 3 envelopes = 2 ways Total number of required ways = 4*2=8 ...
- by uttam.albela
Tue Oct 27, 2009 7:52 pm- Forum: Problem Solving
- Topic: probability!!!
- Replies: 5
- Views: 3175
Re: probability!!!
try this one! OA later! please clarify your answer! Tanya prepared four different letters to be sent to four different addresses. For each letter, she prepared an envelope with its correct address. If the 4 letters are to be put into the envelopes at random, what is the probability that only one le...
- by uttam.albela
Mon Oct 26, 2009 9:54 pm- Forum: Problem Solving
- Topic: probability!!!
- Replies: 5
- Views: 3175
So you are saying that both approaches lead to same answer i.e. 6C3 * 3!. But consider this qn, In how many ways can you re-arrange the letters in the word "DOUBLE" such that first letter must start with "D" and last letter must end with "E"? This answer is 4!. My qn i...
- by uttam.albela
Sat Oct 24, 2009 11:23 am- Forum: Problem Solving
- Topic: Re-arranging letters
- Replies: 9
- Views: 1748
Re: Re-arranging letters
Let us just rephrase this question. There are 6 chairs. 6 Persons are to be seated. 3 of them named A, B, and C want to be in the same order. But other people may or may not seat between them. We can plan for the sitting in two ways. First make the other 3. and then A,B and C. Solution: 6 empty chai...
- by uttam.albela
Sat Oct 24, 2009 3:31 am- Forum: Problem Solving
- Topic: Re-arranging letters
- Replies: 9
- Views: 1748
Re: Help!
If i have 1/5 < 1/k-1 < 1/2 How do we say that k-1 = 3 or 4 ?????? I see k-1 is less than 2 and more than 5, because on the number line k-1 is more than 5 and less than 2. I am getting the opposite of the OE. Let us do 1/(1/5), 1/(1/k-1) and 1/(1/2). When we do these operations the comparison signs...
- by uttam.albela
Fri Oct 23, 2009 5:51 am- Forum: Data Sufficiency
- Topic: Help!
- Replies: 3
- Views: 1223
- by uttam.albela
Fri Oct 23, 2009 5:45 am- Forum: Data Sufficiency
- Topic: DS 4
- Replies: 3
- Views: 2200
edited the answer.gmater29 wrote:Apologise, a mistake in the question its f(n) = a^n where a is a constant.
- by uttam.albela
Fri Oct 23, 2009 5:42 am- Forum: Data Sufficiency
- Topic: 1 DS 8
- Replies: 3
- Views: 1242
Re: four uncles and three aunts
F and M are father and mother of S, respectively. S has four uncles and three aunts. F has two siblings. The siblings of F and M are unmarried. How many brothers does M have? (1) F has two brothers. (2) M has five siblings. OA in next post. Consider option 1. F has 2 siblings and both are male. So ...
- by uttam.albela
Fri Oct 23, 2009 5:40 am- Forum: Data Sufficiency
- Topic: four uncles and three aunts
- Replies: 1
- Views: 1733
Re: DS ques
Someone sort this out please!!!!!!!! Ques: A “Gamma Sequence� is defined as an infinite sequence of positive integers where no integer appears more than once, and there is a finite number of prime numbers in that sequence. The sequence H is an infinite sequence of positive integers, where no in...
- by uttam.albela
Fri Oct 23, 2009 5:25 am- Forum: Data Sufficiency
- Topic: DS ques
- Replies: 3
- Views: 1539
Re: Arc of a circle
The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is 4π/3 what is the length of line segment RU? A. 4/3 B. 8/3 C. 3 D. 4 E. 6 Circumference of the circle = 2 * π * r = 8π 8π unit of length = 360 degree of angle at the centre 1 unit of length = 360 / 8π degree 4...
- by uttam.albela
Fri Oct 23, 2009 5:12 am- Forum: Problem Solving
- Topic: Arc of a circle
- Replies: 2
- Views: 2224
Re: 1 DS 8
For all integers n, the function f is defined by f (n) = an, where a is a constant. What is the value of f (1)? (1) f(2)=100 (2) f(3)=-1,000 f(n)= a ^ n so f(1) = a ^ 1 = a So the question is actually what is the value of a? option 1) f(2) = a ^ 2 = 100 a = + - 10 , so we do not know a. option 2) f...
- by uttam.albela
Fri Oct 23, 2009 5:06 am- Forum: Data Sufficiency
- Topic: 1 DS 8
- Replies: 3
- Views: 1242
Re: DS 4
If vmt ≠0, is v2m3t-4 > 0? (1) m>v2 (2) m>t-4 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D...
- by uttam.albela
Fri Oct 23, 2009 4:59 am- Forum: Data Sufficiency
- Topic: DS 4
- Replies: 3
- Views: 2200
Re: MGMAT-addition
2 2 a 3 4 b 9 0 (This is an addition) If a and b represent positive single digits in the correctly worked computation above, what is the value of the two digit integer ba? a) 10 b) 15 c) 25 d) 51 e) 52 ............................. I got the correct values of B=5 and a=2.But missed this question as...
- by uttam.albela
Fri Oct 23, 2009 4:48 am- Forum: Problem Solving
- Topic: MGMAT-addition
- Replies: 2
- Views: 1336
How come sum of children = N * (x + (N-1)*3/2)? Divide by 2 is inside the bracket. It is same as what you have written but after division of terms withing outside bracket by 2. (N-1)*3/2 ?? or it should be (N-1)*3 and this question had one add and other even choices...so i also started by putting 5...
- by uttam.albela
Fri Oct 23, 2009 2:25 am- Forum: Problem Solving
- Topic: Arranging the children
- Replies: 5
- Views: 2227