GMAT Question of the Day : Data Sufficiency

V Pat
#1. October 26th, 2006, at 6:30 PM.

A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient) …. Assuming (1) is (x^2 – y^2) / (x + y) = 4

Ben
#2. October 27th, 2006, at 3:16 AM.

Agreed, statement 1 is sufficient.

RM
#3. October 27th, 2006, at 1:55 PM.

(a)

sharanya
#4. October 27th, 2006, at 3:35 PM.

A

FM
#5. October 27th, 2006, at 8:05 PM.

A

bluesclues9
#6. October 27th, 2006, at 10:39 PM.

A

anchal
#7. October 29th, 2006, at 12:48 AM.

A

vik32
#8. October 29th, 2006, at 1:53 AM.

A

GOPI
#9. November 19th, 2006, at 7:14 PM.

A OR NOTHING

AP
#10. April 15th, 2007, at 2:22 PM.

A

Shashwat
#11. April 14th, 2008, at 6:18 PM.

Lemme understand, are we assuming the box operator as “-”
what if it is “+”?
(x2+y2)/(x+y) = 4 does not give me the value of (x+y) na , or does it?
Similarly box operator can be any operator na?

Pramod
#12. April 14th, 2008, at 7:11 PM.

I am with Shashwat.
Either the operator is not displayed properly or the the answer is E.

Dharm
#13. April 15th, 2008, at 6:04 AM.

Answer is Option A

imon
#14. April 17th, 2008, at 12:41 PM.

A

kv
#15. April 23rd, 2008, at 6:46 PM.

x^2 -y^2 = (x+y)(x-y)

(x+y)(x-y)/x+y = x-y = 4

therefore a

shilpa
#16. August 7th, 2008, at 3:07 AM.

A

Manisha
#17. September 10th, 2008, at 10:15 AM.

A

vivek
#18. September 10th, 2008, at 10:30 AM.

Ans is E. Since we cannot find the value

Basant
#19. September 10th, 2008, at 8:58 PM.

A

jaspreet
#20. September 10th, 2008, at 10:55 PM.

A

Mallik
#21. September 11th, 2008, at 9:33 AM.

A

kapil
#22. September 11th, 2008, at 10:24 AM.

A

Kaushik
#23. September 11th, 2008, at 2:05 PM.

Answer is C

As if x+y=0 you cann’t simply cancle x+y terms from neumerator & denominator of equation 1. for x+y=0 equation 1 will become a redaundant equation i.e 0=0 so eq 1 is not alone sufficient.
equation II itself is not alone sufficient.
But i & ii together can solve it by putting value of eq ii x+y=7 in equation i and answer x-y=4.

shafeeque_ismail
#24. September 11th, 2008, at 11:24 PM.

Kaushik,
x and y are positive

Sandeep Gupta
#25. September 11th, 2008, at 11:34 PM.

Solving the statement 1 =
(x+y)(x-y) / (x+y) = 4
therefore x-y = 4
Statement 1 is sufficient to answer

Testing Statement 2
x+y = 7 which is not sufficient to anwer the question. Hence my answer is A

sanjay jahazi
#26. September 12th, 2008, at 1:19 PM.

Kushik initially i also thought on similiar reasoning but as Ismail has correctly pointed out x n y are positive.

so correct ans should be A

Doom
#27. September 12th, 2008, at 3:32 PM.

A

harry
#28. September 14th, 2008, at 9:13 PM.

Its A

nothimpossible
#29. September 17th, 2008, at 11:07 PM.

A