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# PS:Source unknown.

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Intern
Joined: 13 Jul 2009
Posts: 3

Kudos [?]: [0], given: 6

PS:Source unknown. [#permalink]

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13 Jun 2010, 22:34
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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How many four-digit numbers that do not contain the digits 3 or 6 are there?

(A) 2401

(B) 3584

(C) 4096

(D) 5040

(E) 7200

[Reveal] Spoiler:
B

Kudos [?]: [0], given: 6

Senior Manager
Joined: 25 Jun 2009
Posts: 298

Kudos [?]: 150 [1], given: 6

Re: PS:Source unknown. [#permalink]

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14 Jun 2010, 06:01
1
This post received
KUDOS
sivangi wrote:
How many four-digit numbers that do not contain the digits 3 or 6 are there?

(A) 2401

(B) 3584

(C) 4096

(D) 5040

(E) 7200

[Reveal] Spoiler:
B

Welcome to the club..!

We can have 7 digits ( 1,2,4,5,7,8,9) for the first place ( thousand's place).
and similarly 8 digits for hundred's, tenth's and unit digit. ( 0,1,2,4,5,7,8,9)

So in total 7*8*8*8= 3584

Hence B

Hope this helps.

Kudos [?]: 150 [1], given: 6

Intern
Joined: 13 Jul 2009
Posts: 3

Kudos [?]: [0], given: 6

Re: PS:Source unknown. [#permalink]

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14 Jun 2010, 09:13
Thanks a lot.
The explanation was really helpful and easy to understand.

Kudos [?]: [0], given: 6

Senior Manager
Status: Yeah well whatever.
Joined: 18 Sep 2009
Posts: 341

Kudos [?]: 78 [0], given: 17

Location: United States
GMAT 1: 660 Q42 V39
GMAT 2: 730 Q48 V42
GPA: 3.49
WE: Analyst (Insurance)
Re: PS:Source unknown. [#permalink]

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14 Jun 2010, 14:36
0036 isn't a four digit number?

what about negatives?
_________________

He that is in me > he that is in the world. - source 1 John 4:4

Kudos [?]: 78 [0], given: 17

Intern
Joined: 13 Jul 2009
Posts: 3

Kudos [?]: [0], given: 6

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15 Jun 2010, 06:57
0036 is not a four-digit number,it is a two-digit number.The question asks for a four-digit number that do not contain 3 or 6.

Kudos [?]: [0], given: 6

Senior Manager
Status: Yeah well whatever.
Joined: 18 Sep 2009
Posts: 341

Kudos [?]: 78 [0], given: 17

Location: United States
GMAT 1: 660 Q42 V39
GMAT 2: 730 Q48 V42
GPA: 3.49
WE: Analyst (Insurance)
Re: PS:Source unknown. [#permalink]

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15 Jun 2010, 07:24
i realize the question said no 3's or 6's but i just used 0036 as an example. thanks. i appreciate the clarity.
_________________

He that is in me > he that is in the world. - source 1 John 4:4

Kudos [?]: 78 [0], given: 17

Re: PS:Source unknown.   [#permalink] 15 Jun 2010, 07:24
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# PS:Source unknown.

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