GMAT Question of the Day : Data Sufficiency

magnus1
#1. April 15th, 2007, at 1:57 PM.

(1) => 2x > y which => 4x > 2y. However, this does not clearly tell whether 4x is greater than or less than 3y. INSUFFICIENT.

(2) => x > y which => 3x > 3y. This again does not clearly tell whether 4x is greater than or less than 3y. INSUFFICIENT.

(1) + (2) combined fail to clarify whether 4x is greater than 3y or not.

Hence, ans is E

magnus1
#2. April 15th, 2007, at 1:59 PM.

Correction in my earlier post:
(2) => x < y which => 3x < 3y. This again does not clearly tell whether 4x is reater than or less than 3y. INSUFFICIENT.

Answer remains the same, however.

AP
#3. April 15th, 2007, at 2:01 PM.

Agree with magnus. Answer is E.

Maulik
#4. April 15th, 2008, at 4:09 PM.

E

piyush
#5. April 15th, 2008, at 4:38 PM.

E

Jitendra
#6. April 15th, 2008, at 10:48 PM.

1 Says –> x > y-x
==> 2x > y
==> 4x > 2y
==> 6x > 3y
Hence, we can definately say that 4x is NOT >3y
1 is SUFFICIENT
2 is UNSUFFICIENT as explained before
Thus answer should be ‘A’

Take GMAT team please clarify.

sumanth toom
#7. April 17th, 2008, at 11:16 AM.

Ans is E and not A.
Jitendra, here is what you missed. 2y 3x.
ex: x = 4 and y = 5.

imon
#8. April 17th, 2008, at 1:11 PM.

B

Rooney
#9. April 25th, 2008, at 12:16 PM.

I think the answer should be E. This is my approach.
From the question, both X and Y are positive: X > 3/4Y ? or X > 0.75Y ?
Statement 1: X > Y-X
2X > Y
X > Y/2 or X > 0.5Y
If X = 0.6Y, the answer is NO. However, if X = 0.8Y, the answer is YES.
Since the answer can be either YES or NO, statement 1 is insufficient.

Statement 2: X/Y

shilpa
#10. August 7th, 2008, at 2:58 AM.

E

Ramz
#11. September 9th, 2008, at 12:29 PM.

E is correct.
Draw xy coordinates for 4x-3y=0 ;

then for 1st: x>y/2 coordinate shows there is diff between the planes..doesn not confirm
second one does not confirm either

combinming 2: again no results

santo
#12. September 9th, 2008, at 1:15 PM.

B.

shakya
#13. September 9th, 2008, at 8:46 PM.

b

jaspreet
#14. September 9th, 2008, at 10:40 PM.

E

Yao
#15. September 9th, 2008, at 10:56 PM.

E. The question is whether x > 3/4y. 1st hint gives x 0.5y.

That does not mean x cannot be one of the infinite values between 0.5y and 3/4y.

Latha
#16. September 10th, 2008, at 12:30 PM.

B

Basant
#17. September 10th, 2008, at 9:00 PM.

E acc to me…

Deepika
#18. September 11th, 2008, at 3:03 PM.

IMO B

Deepika
#19. September 11th, 2008, at 3:08 PM.

Sorry I go for E.
As Everyone agrees stmt-1 is not sufficient i will explain stmt-2

Stmt 2 says x/y < 1 it means always y is greater than x.

so if we take x=1 y= 2 then 4x is not greater than 3y
x= 4 y = 5 the it is greter
Hence we dont hav a definate ans.

Dharm
#20. September 11th, 2008, at 5:40 PM.

My answer is Option E

Doom
#21. September 12th, 2008, at 3:37 PM.

e

kapil
#22. September 13th, 2008, at 9:43 AM.

E