Search found 65 matches
- by erdnah
Mon Aug 27, 2007 10:00 pm- Forum: Data Sufficiency
- Topic: GMATPrep - Number line
- Replies: 1
- Views: 1407
i think everything between the thrid root of 2 and 1 satisfies II.
but a real explanation would be nice; don't know it...
- by erdnah
Mon Aug 27, 2007 12:44 pm- Forum: Problem Solving
- Topic: Number properties - another question
- Replies: 2
- Views: 1337
i think you're losing many points with the last questions you've to guess. before starding quant for example, i write down the following on my scrap paper (thanks to mgmat): 60 - 8 45 - 15 30 - 23 15 - 31 this means, if i've 60 minutes left, i should be on question 8 or fast. if i've 45 minutes left...
- by erdnah
Mon Aug 27, 2007 12:19 pm- Forum: GMAT Strategy
- Topic: Need help - Demoralized!
- Replies: 14
- Views: 3322
- by erdnah
Mon Aug 27, 2007 11:58 am- Forum: Data Sufficiency
- Topic: GMAT Prep: Geometry
- Replies: 5
- Views: 2199
GMAT Prep: Geometry
If a and b are both positive numbers, what are the coordinates of the midpoint of the line segment CD in the xy-plane?
(1) The coordinates of C are (a, 1-b).
(2) The coordinates of D are (1-a, b).
- by erdnah
Mon Aug 27, 2007 11:04 am- Forum: Data Sufficiency
- Topic: GMAT Prep: Geometry
- Replies: 5
- Views: 2199
- by erdnah
Mon Aug 27, 2007 10:51 am- Forum: Data Sufficiency
- Topic: Gmat Prep - number properties
- Replies: 5
- Views: 2030
(1) x-y=0.5 if x is positive and greater 0.5, y has to be positive too if x is positive and 0.5, y has to be zero if x is positive but less 0.5, y has to be negative if x is zero or less, y has to be negative NOT sufficient (2) x/y>1 either x and y are both positive or negative NOT sufficient (1) an...
- by erdnah
Mon Aug 27, 2007 10:43 am- Forum: Data Sufficiency
- Topic: Gmat Prep - number properties
- Replies: 5
- Views: 2030
- by erdnah
Mon Aug 27, 2007 10:08 am- Forum: Problem Solving
- Topic: Geometry - GMAT prep test
- Replies: 1
- Views: 8155
- by erdnah
Sun Aug 26, 2007 11:33 am- Forum: Problem Solving
- Topic: How to factor a quadriatic?
- Replies: 6
- Views: 1877
- by erdnah
Fri Aug 24, 2007 11:45 pm- Forum: Problem Solving
- Topic: GMAT Prep - No Properties
- Replies: 1
- Views: 1399
- by erdnah
Fri Aug 24, 2007 6:06 am- Forum: I just Beat The GMAT!
- Topic: 680. Gotta take it again.
- Replies: 12
- Views: 7010
2^s = 2^u + 2^v
s = u + v
I. no
II. no
III. yes, s = v - u, and u is a positive integer and so cannot be 0!
D
- by erdnah
Fri Aug 24, 2007 1:17 am- Forum: Problem Solving
- Topic: sum of unknown power
- Replies: 5
- Views: 1504
2x-3y < -6
if x is positive and y is negative, there is no chance for fulfill the inequality (lowest result in this case is near -1). so +x-y quadrant can't contain such a point (E)
- by erdnah
Fri Aug 24, 2007 1:14 am- Forum: Problem Solving
- Topic: E
- Replies: 5
- Views: 1908
hours walking day 1: 18 = d + d + 2 = 8
hours walking day 2: 10
average speed:
8x + 10(x+1) = 64
8x + 10x + 10 = 64
18x = 54
x = 3
B
- by erdnah
Fri Aug 24, 2007 1:06 am- Forum: Problem Solving
- Topic: B
- Replies: 1
- Views: 1491
1) not suff
2) not suff
= a, b, d eliminated
r=s=t=1 => rst = 1
r= 1/3, s = 3, t = 1/3 => rst = 1/3
so: e
- by erdnah
Fri Aug 24, 2007 12:48 am- Forum: Data Sufficiency
- Topic: WHy not C?
- Replies: 1
- Views: 1303