Search found 17 matches
I went with 0 at first... I was thinking, "this bitch could buy 20 apples, and that would do it, but who buys that many apples at once? 4 and 1 makes more sense, but I guess she doesn't HAVE to buy that one apple from the convenience store".
Kind of a weird question.
- by Edthesock
Sat Feb 07, 2009 7:23 pm- Forum: Problem Solving
- Topic: Stores & apples:
- Replies: 11
- Views: 3097
first thing to do is break 10^10 into something easier to work with: 10^10 = (5x2)^10 = 5^10 x 2^10 Can't really do much more with it than that. For the 1st equation, x > 2^34 we know that if 2^34 > 10^10, then this answer is sufficient. If not, x can potentially be a number lower than 10>10, but al...
- by Edthesock
Sat Feb 07, 2009 7:20 pm- Forum: Data Sufficiency
- Topic: Is x>10^10
- Replies: 7
- Views: 6949
mals24, I don't think the errors you gave were fair, it has more to do with what the sentences are actually 'technically' saying. A) Agatha Christie's travels with her archaeologist husband inspired her to write several mystery novels; travelers to Egypt can still stay at the Old Cataract Hotel, the...
- by Edthesock
Thu Feb 05, 2009 9:11 pm- Forum: Sentence Correction
- Topic: Agatha Christie
- Replies: 20
- Views: 7882
solution
Total number of ways to pick 4 cards from 12 unique cards: 12C4 = 12!/(8!*4!) = 495 there are 3 cases: 1. 2 pairs ex. 2,2,1,1 2. 1 pair, 2 individual ex. 4,4,5,3 3. 4 individual ex 1,4,5,6 For case one: there are 6 pairs, so we will pick 2 of them: 6C2 = 6!/(4!x2!) = 30 We must divide this by 2! sin...
- by Edthesock
Wed Feb 04, 2009 12:07 pm- Forum: Problem Solving
- Topic: deck of cards
- Replies: 29
- Views: 10169
- by Edthesock
Thu Jan 29, 2009 7:52 pm- Forum: Data Sufficiency
- Topic: MGMAT Antelope rate of growth
- Replies: 2
- Views: 1278
Manhattan CAT GMATs
yeah, I bought the manhattan gmat tests as well. they're pretty long winded and overly complicated generally. the difficulty level isn't beyond reasonable, as much as the questions take far more time to do than real gmat questions do. I looked at this one and didn't really know what to do with it, b...
- by Edthesock
Thu Jan 29, 2009 7:44 pm- Forum: Data Sufficiency
- Topic: statistics manhattan gmat
- Replies: 4
- Views: 3986
B
I'm going with B, even though I'm sure there are plenty of organisms that swim at near-surface levels where motorboats go. Like Microbes of some sort... but whatever. B
- by Edthesock
Mon Jan 26, 2009 8:34 pm- Forum: Critical Reasoning
- Topic: MGMAT
- Replies: 24
- Views: 7071
Question Answers were posted toootally incorrectly
A sphere is inscribed in a cube with an edge of 10. What is the shortest possible distance from one of the vertices of the cube to the surface of the sphere? The question is correct, and I don't remember what the available answers are because I did this question a while ago, but I will show how to g...
- by Edthesock
Wed Jan 21, 2009 5:02 pm- Forum: Problem Solving
- Topic: tough gemoetry question
- Replies: 16
- Views: 8752
question was posted incorrectly
I want to point out that the question is NOT 12n and n12 - 12n, it is the following: If n is a non-negative integer such that 12^n is a divisor of 3,176,793, what is the value of n^12 - 12^n. 12^0 = 1, and one is a divisor of all numbers (possibly with some exception I'm not thinking of, like 0 or i...
- by Edthesock
Wed Jan 21, 2009 3:11 pm- Forum: Problem Solving
- Topic: manhatan gmat 3
- Replies: 9
- Views: 6166
- by Edthesock
Wed Jan 21, 2009 8:27 am- Forum: Problem Solving
- Topic: How many factors does 36^2 have?
- Replies: 17
- Views: 21269
great post Stuart
thanks for the post Stuart.
one small error in your explanation in part b though, the Greatest Common Denominator of 70 and 20 is 10 and not 5, isn't it?
Other than that, it was flawless. Great job! I had no idea how to do this on my own.
- by Edthesock
Tue Jan 20, 2009 10:54 pm- Forum: Problem Solving
- Topic: manhattan gmat divisibility
- Replies: 3
- Views: 7171
What if the question had asked about n + 1 instead?
If the question had been about n + 1 rather than n - 1, would the answer be E, since both n as well as n + 1 could have potentially been the term that was the multiple of 3?
- by Edthesock
Tue Jan 20, 2009 10:34 pm- Forum: Data Sufficiency
- Topic: Divisibility: Is positive integer n-1 a multiple of 3 ?
- Replies: 6
- Views: 9128
99% sure the answer is B
I also got B. First, it's critical to know that 24^2 = 576, and also that 288 x 2 = 576. Remarking those two points is critical to solving this problem. Next, just ignore k, it doesn't affect anything. next, see which of the answers can be factored into the 288*X*K format: A) 24k*[root 3] = square r...
- by Edthesock
Tue Jan 20, 2009 10:16 pm- Forum: Problem Solving
- Topic: Radicals/Roots: If k and x are positive integers and x is di
- Replies: 2
- Views: 5796
Nice, thanks for the math fact
I thought the answer was B, and it never occurred to me that 0 would not be considered a factor of 26...
26 x 0 = 0 but 26/0 does not = 0, it's infinity/undefined.
Completely overlooked that. That sort of thing is why you do this for a living, and I don't![/img]
- by Edthesock
Tue Jan 20, 2009 8:42 pm- Forum: Data Sufficiency
- Topic: Divisibility: If x is a positive integer, is x-1 a factor of
- Replies: 3
- Views: 4544
great job! still one little question though
Wow... I spent so long on this. Very good job Sudhir, very impressive, especially if you did it in 2 minutes like a standard GMAT question!
I'm okay for solving x to get 2 days in the compound interest formula, but how do you know the stock was sold 1 day later?
- by Edthesock
Tue Jan 20, 2009 8:15 pm- Forum: Problem Solving
- Topic: Investment, Interest rates and formula
- Replies: 4
- Views: 2901