Search found 18 matches
GMAT PREP DS
In the xy- plane, does the line with equation y=3x + 2 contain point (r,s)?
(1) (3r+2-s)(4r+9-s)=0
(2) (4r-6-s) (3r+2-s)=0
I say that they equal each other....but get stuck going down that road...no variables...
- by sykedaddy
Fri Jul 06, 2007 4:01 pm- Forum: Data Sufficiency
- Topic: GMAT PREP DS
- Replies: 7
- Views: 5133
One way to cut down the work is to note that 75 is odd....
Only way to have the sum of numbers be odd is if the numbers are odd...
so A^2, B^2 and C^2 are odd...so A,B,C are odd....
and all options are <9...so plug in from there...
- by sykedaddy
Thu Jul 05, 2007 4:05 am- Forum: Problem Solving
- Topic: PS Question
- Replies: 1
- Views: 1555
Easiest way for me was to rewrite...I just dislike fractions...
(1/5)^m *(1/4)^18=1/2(10)^35
(5)^-m * (2)^-36 = (2)^-1 * (2)^-35 * (5)^-35
..........................= (2)^-36 * (5)^-35
take out both (2)^-36 and
5^-m = 5^-35
- by sykedaddy
Wed Jul 04, 2007 1:37 pm- Forum: Problem Solving
- Topic: exponents - no clue
- Replies: 3
- Views: 1943