Search found 102 matches
If x and y are integers, is xy + 1 divisible by 3? (1) When x is divided by 3, the remainder is 1. (2) When y is divided by 9, the remainder is 8. Statement 1: No info on y Statement 2: No info on x COMBINE: When y is divided by 9, the remainder is 8 => when y is divided by 3, the remainder is 2 The...
- by austin
Tue Apr 21, 2009 3:42 am- Forum: Data Sufficiency
- Topic: Divisibility by 3
- Replies: 5
- Views: 1382
I am quoting fleurdelisse's question and the discussion link here: In the rectangular coordinate, does line k interest quandrant II? (quandrant II being the quandrant where x<0 and y>0) (1) slope of k is -1/6 (2) y-intercept of k is -6 http://www.beatthegmat.com/line-and-slope-t35149.html This, I th...
- by austin
Tue Apr 21, 2009 3:19 am- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo II
- Replies: 18
- Views: 3343
Agree with BM...
statement 1 is sufficient..
statement 2: The line cuts at (0,-6)... It could pass through 2nd quad, but NEED NOT (it might pass through I and III and still make an intercept of -6 with y axis)...
A
- by austin
Tue Apr 21, 2009 3:15 am- Forum: Data Sufficiency
- Topic: Line and slope
- Replies: 2
- Views: 1117
When we say intercept of three, the distance from (0,0) is 3...but, is it in the positive or negative direction??? If a line passes through (3,0) or (-3,0), the intercept is still 3.. but the slopes could be different.... TRY YOURSELF: You can draw two lines: one through (3,0) and the other through ...
- by austin
Tue Apr 21, 2009 2:57 am- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo II
- Replies: 18
- Views: 3343
If a line passes through the first and third quadrants, the slope of the line could be +ve or -ve. The correct answer to this question is C.
NOTE: For a line passing thru 1 and 3 quad, slope is +ve
For a line passing thru 2 and 4 quad, slope is -ve
- by austin
Mon Apr 20, 2009 8:58 pm- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo II
- Replies: 18
- Views: 3343
- by austin
Fri Apr 17, 2009 3:33 am- Forum: Data Sufficiency
- Topic: a rather hard one
- Replies: 3
- Views: 1212
- by austin
Wed Apr 08, 2009 11:20 pm- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo
- Replies: 3
- Views: 1230
Good DS question - Cogeo II
What is the slope of line p?
1. The x-intercept is twice the y intercept
2. The line passes through I and III quadrants
OA in a bit
- by austin
Wed Apr 08, 2009 11:19 pm- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo II
- Replies: 18
- Views: 3343
DS Philosophy
As Stuart rightly put it, we need not find the exact answer in DS (unlike PS). All we need to check is whether the statement(s) give us a 100% unique (consistent) answer.
- by austin
Tue Apr 07, 2009 10:58 pm- Forum: Data Sufficiency
- Topic: Primes: If p is a prime number greater than 2, what is the v
- Replies: 14
- Views: 13228
Good DS question - Cogeo
Are lines p (with slope m) and q (with slope n) perpendicular to each other?
1. m + 2 = n
2. m + n = 0
OA in a bit
- by austin
Tue Apr 07, 2009 10:48 pm- Forum: Data Sufficiency
- Topic: Good DS question - Cogeo
- Replies: 3
- Views: 1230
4GMAT prep
Hi Angu, 4GMAT verbal prep is very good.. it is taught by faculties who have been training students for the GMAT for almost a decade now... To mayonnai5e: You talk of leeching off money - the so called big brands charged 2.5 times more than what 4GMAT charged me...I scored a 98th percentile.. studie...
- by austin
Mon Jan 19, 2009 2:25 am- Forum: GMAT Strategy
- Topic: 4GMAT Verbal course
- Replies: 4
- Views: 5302
odd*odd = odd
even*odd = even
even*even = even
c x (d+1) is even => c can be odd or even...
(c+2) x (d+4) is even => c can be odd or even
combine; if d+1 is even, d+4 is odd...if d+1 is odd, d+4 is even..
=> c has to be even...(even*odd = even; even*even = even)
- by austin
Sat Dec 06, 2008 10:36 am- Forum: Data Sufficiency
- Topic: Is C even?
- Replies: 2
- Views: 1857
- by austin
Thu Dec 04, 2008 7:32 am- Forum: Data Sufficiency
- Topic: MGMAT inequality!! right or wrong?
- Replies: 8
- Views: 1690
If -2x>3y, is x negative?
Stem translation: if x < (-3/2)y, is x <0??
(1) y>0 => x is negative....
(2) 2x+5y-20=0
2x + 5y = 20
x < -1.5 y.
put x = -2y => y = 20; x<-30=> x is negative...
you can try for different values...
D
- by austin
Thu Dec 04, 2008 7:30 am- Forum: Data Sufficiency
- Topic: If -2x>3y, is x negative?
- Replies: 6
- Views: 5305
The last 10-20 problems in OG (PS and DS) are the kind of questions you will get in your exam.. In that sense, the overall level of questions in OG is low...you need to work on more difficult questions.. you can have a look at the math section in this forum.. lots of challenging questions posted and...
- by austin
Wed Dec 03, 2008 11:02 pm- Forum: GMAT Math
- Topic: Time consideration in OG-11
- Replies: 2
- Views: 1730