Search found 11 matches


Well, under my humble opinion the 12th edition is the very worst ever edition. I teach for the GMAT since 1994 and I have all editions form OG and all the possible "old" booklets since it was paper base test. 12th edition not pass the test by other OG editions.... Sincerely Alberto Vidal What do yo...

by hephzi_bah

Wed May 12, 2010 7:41 pm
Forum: Problem Solving
Topic: Knewton Early Analysis of the OG 12th Edition Math Section
Replies: 18
Views: 21134

Hey everyone, This is my first post. Unfortunately Im staining it with a relatively easy question, lol. It takes two men three hours to mow a lawn. How many hours will it take for 12 men to mow the same lawn? The solution is what confused me. I was able to solve it in my head without algebra, propo...

by hephzi_bah

Wed May 12, 2010 7:52 am
Forum: GMAT Math
Topic: Simple, Basic Math problem
Replies: 5
Views: 1717

DS Question: On the number line, the distance between point A and point C is 5 and the distance between point B and C is 20. Does point C lie between point A and point B? 1. The distance between point A and point B is 25. 2. Point A lies to the left of B. PS Question: A hiker walking at a constant ...

by hephzi_bah

Wed May 12, 2010 7:42 am
Forum: GMAT Math
Topic: please help with several math problems
Replies: 8
Views: 5134

DS Question: On the number line, the distance between point A and point C is 5 and the distance between point B and C is 20. Does point C lie between point A and point B? 1. The distance between point A and point B is 25. 2. Point A lies to the left of B. PS Question: A hiker walking at a constant ...

by hephzi_bah

Wed May 12, 2010 7:26 am
Forum: GMAT Math
Topic: please help with several math problems
Replies: 8
Views: 5134

ninamehta wrote:hey,

thanks guys. i checked out landmark but they didn't have it either. managed to get hold of a friend who had the books so that's sorted. now trying to wrap my head around all the concepts.

Cheers
Nina
Did you need my Manhattan GMAT ebooks?

Sincerely
Alberto Vidal

by hephzi_bah

Wed May 12, 2010 6:59 am
Forum: GMAT Math
Topic: Manhatta GMAT books
Replies: 4
Views: 1361

sarahw_gmat wrote:Wasn't sure how to calculate work per person per day. Now it makes sense.
Thanks.
I prefer to use my way:


Image


Sincerely
Alberto Vidal

by hephzi_bah

Mon May 10, 2010 12:52 pm
Forum: GMAT Math
Topic: Work Problem
Replies: 5
Views: 6422

Well, under my humble opinion the 12th edition is the very worst ever edition. I teach for the GMAT since 1994 and I have all editions form OG and all the possible "old" booklets since it was paper base test. 12th edition not pass the test by other OG editions.... Sincerely Alberto Vidal What do yo...

by hephzi_bah

Mon May 10, 2010 11:59 am
Forum: Problem Solving
Topic: Knewton Early Analysis of the OG 12th Edition Math Section
Replies: 18
Views: 21134

Let total number of rat 100x and 100y rats dies in the experiment hence Total Died Death-rate male 40x 30y 4x/3y Female 60x 70y 6x/7y So death rate of male rat : death rate of female rat=4x/3y :6x/7y =14:9 Ans 14:9 Please let me correct it. http://s3.postimage.org/E3cW9.jpg THE ANSWER IS 9:14 THANK...

by hephzi_bah

Mon May 10, 2010 11:05 am
Forum: GMAT Math
Topic: died were male rats
Replies: 6
Views: 1804

12 hours for 5 days = 60 hours 24 hours for 2 days = 48 hours Total hours in a week = 7 * 24 = 168 Fraction is - 108/168 or 27/42 = [spoiler]9/14[/spoiler] [spoiler] 9/14 [/spoiler]? how many votes? Well I think this is a short way: 5 days times one half = 5/2 2 days times one =2 from 7 days means ...

by hephzi_bah

Fri May 07, 2010 6:06 pm
Forum: GMAT Math
Topic: electric-company plan
Replies: 3
Views: 1395

Let total number of rat 100x and 100y rats dies in the experiment hence Total Died Death-rate male 40x 30y 4x/3y Female 60x 70y 6x/7y So death rate of male rat : death rate of female rat=4x/3y :6x/7y =14:9 Ans 14:9 Please let me correct it. http://s3.postimage.org/E3cW9.jpg THE ANSWER IS 9:14 THANKS

by hephzi_bah

Fri May 07, 2010 2:28 pm
Forum: GMAT Math
Topic: died were male rats
Replies: 6
Views: 1804

Well, under my humble opinion the 12th edition is the very worst ever edition. I teach for the GMAT since 1994 and I have all editions form OG and all the possible "old" booklets since it was paper base test. 12th edition not pass the test by other OG editions....

Sincerely
Alberto Vidal

by hephzi_bah

Fri May 07, 2010 1:02 pm
Forum: Problem Solving
Topic: Knewton Early Analysis of the OG 12th Edition Math Section
Replies: 18
Views: 21134