Search found 18 matches
If "n" is a positive integer and "r" is the remainder when (n-1)(n+1) is divided by 24, what is the value of r? (1) 2 is not a factor of "n" (2) 3 is not a factor of "n" (1) says that n is odd. Thus n-1 and n+1 are both even. In fact, one of them must be divi...
- by sam117
Sat Sep 22, 2012 1:25 pm- Forum: Data Sufficiency
- Topic: gmat prep remainder question
- Replies: 12
- Views: 11542
Hey Sanju, I believe I did address the fundamental question you raised. If a question asks " What is the remainder when x is divided by 9? ", you will have sufficient data if you can express x as 9a+r where a is an integer and r is known. You will of course not be given r directly. A stat...
- by sam117
Sat May 26, 2012 7:57 am- Forum: Data Sufficiency
- Topic: What is the remainder
- Replies: 12
- Views: 1878
Let the three cars be denoted as A,B and C. If the order is to be taken care: For three trips, the possibilities are: 3-trips, only-1 car => AAA,BBB,CCC -> 3P1 = 3!/(3-1)! = 3 possibilities 3-trips, 2 cars => AAB,ABA,BAA,ABB,BAB,BBA,AAC,ACA,CAA,BBC,BCB,CBB.... -> 3*3P2 = 18 possibilities 3-trips, a...
- by sam117
Sat May 19, 2012 2:26 pm- Forum: Problem Solving
- Topic: gmatprep probability problem
- Replies: 2
- Views: 989
gmatprep probability problem
A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars? A. 0 B. 1...
- by sam117
Sat May 19, 2012 12:19 am- Forum: Problem Solving
- Topic: gmatprep probability problem
- Replies: 2
- Views: 989
- by sam117
Fri May 18, 2012 2:20 pm- Forum: Problem Solving
- Topic: Probabilities
- Replies: 11
- Views: 5253
Hi, I know that this is a quant question. But am I right in saying that "that" has no clear referent here? It seems that "that" refers to "warehouse" instead of "chairs and tables". I found the wording of this question very weird and this led me to skip it in...
- by sam117
Fri May 18, 2012 11:27 am- Forum: Problem Solving
- Topic: Probabilities
- Replies: 11
- Views: 5253
I am sure the above are valid solutions and correct. I am not trying to make this problem more complex than what it is, but to me the wholistic solution is as follows. Again, this is just my opinion. Let the three cars be a, b, c Probability of riding a car = 1/3 Probability of not riding a car = 1...
- by sam117
Fri May 18, 2012 9:13 am- Forum: Problem Solving
- Topic: roller
- Replies: 4
- Views: 1365
Hi, I know that this is a quant question. But am I right in saying that "that" has no clear referent here? It seems that "that" refers to "warehouse" instead of "chairs and tables". I found the wording of this question very weird and this led me to skip it in ...
- by sam117
Fri May 18, 2012 7:24 am- Forum: Problem Solving
- Topic: Probabilities
- Replies: 11
- Views: 5253
- by sam117
Mon May 14, 2012 11:54 am- Forum: Problem Solving
- Topic: probability problem
- Replies: 5
- Views: 3019
probability problem
A certain store sells small, medium, and large toy trucks in each of the colors red, blue green, and yellow. The store has an equal number of trucks of each possible color-size combination. If Paul wants a medium, red truck and his mother will randomly select one the trucks in the store, what is the...
- by sam117
Mon May 14, 2012 11:35 am- Forum: Problem Solving
- Topic: probability problem
- Replies: 5
- Views: 3019
- by sam117
Thu May 10, 2012 4:37 am- Forum: Problem Solving
- Topic: geometry problem
- Replies: 2
- Views: 1013
gmatprep question pack 1
Is there a way to solve this in 2 mn? The official solution is very long. http://s8.postimage.org/f11yx0yc1/Screen_Shot_2012_05_08_at_5_36_55_PM.jpg A total of 800 students were asked whether they found two subjects, M and R, interesting. Each answer was either "yes" or "no" or &...
- by sam117
Tue May 08, 2012 6:42 am- Forum: Problem Solving
- Topic: gmatprep question pack 1
- Replies: 8
- Views: 6567
Is this a realistic question? Is it possible to get a question with so many calculation steps on the GMAT?
- by sam117
Thu Apr 26, 2012 11:13 am- Forum: Problem Solving
- Topic: Is estimation the best way to solve such problems??
- Replies: 4
- Views: 3371
MGMAT CAT
Hi, I know this question has already been posted on this forum but my problem has not yet been addressed. Geologists once thought that the molten rock known as lava was an underground remnant of Earth's earliest days, sporadically erupting through volcanoes, but they now know that it is continuously...
- by sam117
Tue Apr 24, 2012 11:06 am- Forum: Sentence Correction
- Topic: MGMAT CAT
- Replies: 2
- Views: 1000
The question stem asks about a claim made about urban waterfront properties. You say that "A developer who wishes to make a large profit would be wise to buy urban waterfront lots and erect residential buildings on them." is the claim we are asked about. In my opinion this is not a claim a...
- by sam117
Mon Apr 23, 2012 5:43 pm- Forum: Critical Reasoning
- Topic: Waterfront Properties
- Replies: 16
- Views: 4344