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If b=0.cdef where c,d,e and f represent non-zero digits,

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Director
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Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
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Concentration: International Business, Strategy
GMAT Date: 06-22-2012
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If b=0.cdef where c,d,e and f represent non-zero digits, [#permalink] New post 10 Jul 2011, 09:10
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

62% (02:11) correct 38% (01:28) wrong based on 50 sessions
If b=0.cdef where c,d,e and f represent non-zero digits, what is b?

(1) 10'000 * b is divisible by 4938
(2) c>d>e>f and f = 6

[Reveal] Spoiler:
My solution is

Statement 1 --> Not sufficient because b can be 4938 or any multiple of 4938. Therefore, b has got multiple values and therefore this statement is insufficient.

Statement 2--> f = 6 so e can be 7 or 8 Therefore insufficient.

Statement 1 & 2 together are insufficient. So my answer is E. But the book says its B as they say c=3, d = 4, e =5. But my question is stem doesn't say they are consecutive integers so it can't be? Guys - am I reading something wrong over here? can you please help?
[Reveal] Spoiler: OA

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E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610 :-(


Last edited by walker on 26 Dec 2012, 04:44, edited 2 times in total.
Edited the question.
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Re: If b=0.cdef where c,d,e and f represent non-zero digits, [#permalink] New post 01 Oct 2012, 23:00
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madimo wrote:
in these kinds of questions, actually how did you know that the question meant that c,d,e and f represent non zero different digits? it didn't say that the digits are different, so for example, you could have d and e =8, so I believe that the question should have mentioned that these are different non zero digits, and NOT ONLY saying that they are non zero digits.


(2) c>d>e>f and f = 6
c, d, e, and f cannot be equal.
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Re: Decimals [#permalink] New post 10 Jul 2011, 09:36
enigma123 wrote:
If b=0.cdef where c,d,e and f represent non-zero digits, what is b?
1) 1000 * b is divisible by 4938
2) c>d>e>f and f = 6


1) It should be
10000 * b is divisible by 4938
b can be 0.4938 OR 0.9876
Not Sufficient.

2) c>d>e>f and f = 6
c=9, d=8, e=7, f=6
b=0.9876
Sufficient.

Note e can't be 8. If e=8; d=9; Which digit will we assign c to?
Thus, e can only be 7.
Likewise, d=8 and c=9
Sufficient.

Ans: "B"

enigma123:
Please hide everything except the question and option in spoiler.
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Re: If b=0.cdef where c,d,e and f represent non-zero digits, [#permalink] New post 01 Oct 2012, 22:23
in these kinds of questions, actually how did you know that the question meant that c,d,e and f represent non zero different digits? it didn't say that the digits are different, so for example, you could have d and e =8, so I believe that the question should have mentioned that these are different non zero digits, and NOT ONLY saying that they are non zero digits.
Re: If b=0.cdef where c,d,e and f represent non-zero digits,   [#permalink] 01 Oct 2012, 22:23
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