GMAT Question of the Day : Data Sufficiency

himakar
#1. September 15th, 2006, at 9:45 PM.

d

UNKN
#2. September 16th, 2006, at 12:11 PM.

A

Gmat_taker
#3. September 16th, 2006, at 8:18 PM.

Ans should be A…
as we dont have any other number other than 10 that could give the value 4.40$

Deepa
#4. September 17th, 2006, at 8:27 AM.

A

Tural
#5. October 5th, 2006, at 5:05 PM.

1.First answer gives us two possible answers
Since 0.15a+0.29b=4.40 a and b can be 1)5;13 2 )10 ; 10
2.Second answers doesn’t give any exact answer

But if taken together the answer 10 to 10 can be riched

jish
#6. April 19th, 2007, at 12:27 PM.

C

kar
#7. April 19th, 2007, at 2:19 PM.

A

Nrip Nihalani
#8. April 19th, 2007, at 2:30 PM.

A

Ankit Jain
#9. April 19th, 2007, at 7:27 PM.

C

AP
#10. April 20th, 2007, at 12:34 AM.

A

Helio
#11. April 20th, 2007, at 7:52 AM.

C is correct.
Either of them alone is sufficient, but when we put both of them together. x(0.15+0.29)=4.40 => x=10

d0tc0mguy
#12. April 20th, 2007, at 3:05 PM.

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

x(0.15+0.29)=4.40
x=10

sai
#13. April 23rd, 2007, at 11:11 PM.

d

reckless303
#14. April 24th, 2007, at 9:23 AM.

a

Maulik
#15. April 19th, 2008, at 4:24 PM.

A

Shashwat
#16. April 19th, 2008, at 6:09 PM.

Cant think of any other combination other than 10 - 10 stamps of each, to make total of 4.4$

hence, A is sufficient.

Nitin Sood
#17. April 19th, 2008, at 8:12 PM.

common guys…basic math 101 - 2 unknowns ( x = number of $0.15 stamps and y = number of $0.29 stamps) . Logic Says 2 unknowns can only be solved by 2 equations at least. Hence we need both (A) & (B) together to give an answer.
0.15x+0.29y = 4.4
x=y
==>.44x=4.4
==>x=10

jaspreet
#18. April 20th, 2008, at 3:32 AM.

.15n+.29n= 4.40
n= 4.40/.44=10
C is correct

pranaysad
#19. April 20th, 2008, at 4:13 AM.

Either is sufficient

D

Because the only way you can complete this equation

15N1 + 29N2 = 440

is if N1=N2= 10

deedee
#20. April 20th, 2008, at 10:46 AM.

A is correct

Since the numbers N1 and N2 have to be whole numbers, the only way 0.15N1 + 0.29N2= 4.40 is for N1=N2=10. So A is sufficient.

B is not sufficient, as we do not know the total amount spent. Joana could have bought 10 stamps of each kind, or 20, or even 30. etc..

Mitesh
#21. April 20th, 2008, at 9:25 PM.

A is correct

Dillip
#22. April 21st, 2008, at 12:37 PM.

C is the correct one

your mom
#23. April 21st, 2008, at 2:36 PM.

C for shizzle! GMAT team answer please!

KA
#24. April 21st, 2008, at 3:35 PM.

A is correct
only combination posiible is 10*.29 + 10*.15 = 4.4

now
#25. April 23rd, 2008, at 4:58 PM.

A

kv
#26. April 23rd, 2008, at 6:06 PM.

a

Will
#27. April 24th, 2008, at 6:59 PM.

I think A is the ans. There is only one way to come up with the total of $4.4. one of each. I just can’t think of any other combination.

reenu
#28. April 24th, 2008, at 9:00 PM.

i think C is correct

pranaysad
#29. April 25th, 2008, at 2:12 AM.

Yes its A

Because only
10(15) + 10(29) = 440

There is no other way of solving the equation.

Gaurav
#30. April 25th, 2008, at 6:19 PM.

D is the right answer…each statement is fine.

nidhi
#31. May 1st, 2008, at 11:26 PM.

A is correct answer

Ritula
#32. May 5th, 2008, at 7:45 PM.

I think C is the right choice.
We need to take both statements into consideraion if we want to reach the answer. If we consider each 10 then also we have reached the conclusion by knowing that both nos are equal which is by the second statement.

shivani
#33. May 8th, 2008, at 9:12 AM.

Since we have two variables
$0.15X & 0.29 Y , so we need to have two equations to solve this
A) 0.15X + 0.29Y = 4.40, this alone is not sufficient
B) X =Y, This alone is also is no sufficient to solve
So we need both statements , to find out value of X & Y
0.44 X = 4.40 (since X =Y)
X = 10 = Y
C is the correct answer, Both the statements together are sufficent but nither statement alone is sufficient.

shilpa
#34. August 7th, 2008, at 2:37 AM.

C