1. Good post? |

Value of M

Q1. If lM+4l = 2, what is the value of M?
1) M < 0
2) M^2 + 8M +12 = 0

-------------------------------------
Q2. IF X>1 and Y>1, is X<Y?
1) X^2 / (XY+X) < 1
2) XY/ Y^2 -Y < 1

(FROM SET 25)

SPOILER: EE

2. Good post? |
IMO for the second one it should be B

3. Good post? |
First is E

1) | M + 4| = 2 implies that M+4 = 2 or M+4 = -2
i.e M = -2 or M = -6
From cond 1) M<0, insufficient

From cond 2) M^2 + 8M +12 = 0
Hence (M+2)(M + 6) = 0
Again M = -2 or M = -6
Combining both insufficient
Therefore E

Second problem
From st 1 X/ (Y +1) < 1 => X< Y+1
From st 2 X / (Y -1) < 1 => X < Y - 1 => X < Y

Therefore B

Elton

4. Good post? |
i guess the Official Answer for the second question is wrong then
i also have chosen B for the second question..
gd explanation guys!
appreciate it

5. Good post? |
Answer for the second one is E.
http://www.urch.com/forums/gmat-data...set25qq29.html (gmatset25qq29)

6. Good post? |
Yes but it all comes down to the way the denominator is written.
You won't find such ambiguous presentations of questions on the real GMAT.
There everything is written clearly.
This is not a real issue.

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