Search found 46 matches
(1) The example you presented is correct, up until: "= squareroot(4)= +- 2" On the GMAT, anything under a square root sign must yield a positive value. Negative Square roots are imaginary numbers and are outside the scope of the GMAT. Therefore squareroot(4) simply yields a positive value ...
- by rros0770
Wed Apr 27, 2011 8:27 am- Forum: Problem Solving
- Topic: Gmat prep problems
- Replies: 3
- Views: 1199
- by rros0770
Thu Mar 10, 2011 7:31 pm- Forum: Problem Solving
- Topic: Angela's family drank
- Replies: 8
- Views: 2907
I'm coming up with [spoiler]5 (inluding Angela)[/spoiler] I solved it by selecting/plugging in values for the coffee and milk: 6 ounces coffee 4 ounces milk (10 ounces of milk+coffee total) Using the above selected values: 1/6 coffee + 1/4 milk = B-ounces 1 ounce coffee + 1 ounce milk = 2 ounce mixt...
- by rros0770
Thu Mar 10, 2011 6:55 am- Forum: Problem Solving
- Topic: Angela's family drank
- Replies: 8
- Views: 2907
Hi Amit-
Anurag did exclude 121 and 81
By subtracting 1 from the difference between 121 - 81, we are excluding the two extremes from the total count
- by rros0770
Tue Mar 08, 2011 3:58 pm- Forum: Problem Solving
- Topic: √n differ from √100
- Replies: 3
- Views: 1126
Hey Neilcao- Agree with the points Night Reader made. Is this copied word for word also? We're given percentages in the first half of the stem and in both statements, but the 2nd half of the stem asks " ...how many people choose...". It wants a number, which we can't provide from this info...
- by rros0770
Wed Feb 23, 2011 1:54 pm- Forum: Data Sufficiency
- Topic: 80% choose course M and C.....
- Replies: 2
- Views: 944
Got it- I see where our opinions differ here Night Reader: Quoting you: ">=4 means {4,5,6} and =<2 means {1,2} it can also be the case that none of the projects has 3 employees assigned. Please show me precise condition for 3. " I believe the 2nd statetment would encompass none (0) ,1 or 2...
- by rros0770
Fri Feb 11, 2011 11:33 am- Forum: Data Sufficiency
- Topic: ds percents and time distance
- Replies: 14
- Views: 2910
25% assigned to either 4, 5, 6, 7, 8, 9, 10, 11....etc 35% assigned to 0, 1 or 2 40% left unnaccounted for. Median would be the 50% mark, which would then fall under the 3 employee category I'm under the impression it has to be 3 employees, I can't derive any other scenario in which this would not b...
- by rros0770
Fri Feb 11, 2011 11:25 am- Forum: Data Sufficiency
- Topic: ds percents and time distance
- Replies: 14
- Views: 2910
Agree it's C
25% have 4+
35% have 1 or 2
40% of the projects left unaccounted for.
Would have to be 3 employees. If no project had 3 employees assigned to it then 40% of the projects would be left uaccounted for
- by rros0770
Fri Feb 11, 2011 10:55 am- Forum: Data Sufficiency
- Topic: ds percents and time distance
- Replies: 14
- Views: 2910
Hey Night Reader- I follow your logic, just missing why we've ruled out (A) I agree with the calc you set up here: "2n/3=i {i is integer} +1/3" From the stem: (1)We know that (n) is not negative. (2)We know that (n) is not zero, because if (n)= 0 then we get the below, and your calc wouldn...
- by rros0770
Fri Feb 11, 2011 10:32 am- Forum: Data Sufficiency
- Topic: Divisiblity and remainder help
- Replies: 12
- Views: 3886
alltimeacheiver- What's the OA ? Is there a Choice (E) None? As there were only 4 choices posted below I think A is the answer. Let me know if I missed something though: We're told in the question stem that n is nonnegative (zero or positive) and 2n/3 leaves a remainder of 1, so: n= 3(k) + 1 In orde...
- by rros0770
Fri Feb 11, 2011 9:48 am- Forum: Data Sufficiency
- Topic: Divisiblity and remainder help
- Replies: 12
- Views: 3886
Agree with ManSab.
JK-
"I have Y=45, EDC = 45, ECD = 90"
This would be the case if CD=CE
Question states that CE=DE
Therefore EDC and ECD are the angles that are equal to each other, so:
Y= 45, EDC = 67.5, ECD = 67.5
Hope that helped.
- by rros0770
Fri Jan 21, 2011 10:16 am- Forum: Problem Solving
- Topic: Triangles
- Replies: 5
- Views: 5118
Tried solving for both combos and for perms because was confused about the answer choices:
I'm getting 14 if order doesn't matter
If order matters I'm getting the same as Junegmat with 40
Don't think I missed anything....
OA?
- by rros0770
Sat Dec 04, 2010 1:54 pm- Forum: Problem Solving
- Topic: combinations /600-650
- Replies: 5
- Views: 1506
Yep, dead on with needing to factoring it.
Check this post:
http://www.beatthegmat.com/gmat-prep-ex ... 17656.html
- by rros0770
Tue Nov 30, 2010 3:30 pm- Forum: Problem Solving
- Topic: Simplify
- Replies: 1
- Views: 953
If X-Y > 10, is x-y > x+y? Statement 1: x=8 Plug 8 into the first equation: 8-Y > 10 In order for 8-Y to be greater then 10, Y must be a negative number. Plug 8 and (-Y) into the second equation: 8 - (-Y) > 8 + (-Y), this becomes: 8+Y > 8-Y [spoiler]From this we can see that 8+Y is greater the 8-Y S...
- by rros0770
Tue Nov 30, 2010 2:34 pm- Forum: Problem Solving
- Topic: DS Question
- Replies: 2
- Views: 1029
Hey GDK- It's providing us the average cost of the 6 items, not the actual cost of the 6 items. 5 items could cost $1 each and the 6th item could cost $235, and that will average out to $40. In the above scenario, there would be tax on the $125 coat and tax on that $235 item which would total $25.20...
- by rros0770
Fri Nov 26, 2010 12:20 pm- Forum: Data Sufficiency
- Topic: OG 12 DS question
- Replies: 4
- Views: 1581