It is currently 13 Dec 2017, 07:19

Decision(s) Day!:

CHAT Rooms | Ross R1 | Kellogg R1 | Darden R1 | Tepper R1


Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

How many five-digit numbers are there, if the two leftmost

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
avatar
Joined: 02 Dec 2007
Posts: 448

Kudos [?]: 314 [0], given: 6

How many five-digit numbers are there, if the two leftmost [#permalink]

Show Tags

New post 27 Aug 2008, 08:39
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

. How many five-digit numbers are there, if the two leftmost digits are even, the other digits are odd and the digit 4 cannot appear more than once in the number?


a) 1875
b) 2000
c) 2375
d) 2500
e) 3875

Kudos [?]: 314 [0], given: 6

Director
Director
User avatar
Joined: 12 Jul 2008
Posts: 514

Kudos [?]: 166 [0], given: 0

Schools: Wharton
Re: five digit number [#permalink]

Show Tags

New post 27 Aug 2008, 08:42
Nihit wrote:
. How many five-digit numbers are there, if the two leftmost digits are even, the other digits are odd and the digit 4 cannot appear more than once in the number?


a) 1875
b) 2000
c) 2375
d) 2500
e) 3875


C

# of five digit numbers w/o 4 = 3*4*5*5*5 = 1500
# of five digit numbers w/ 4 as first digit = 1*4*5*5*5 = 500
# of five digit number w/ 4 as second digit = 3*1*5*5*5 = 375

Total = 1500+500+375

Kudos [?]: 166 [0], given: 0

SVP
SVP
User avatar
Joined: 07 Nov 2007
Posts: 1790

Kudos [?]: 1102 [0], given: 5

Location: New York
Re: five digit number [#permalink]

Show Tags

New post 27 Aug 2008, 08:46
Nihit wrote:
. How many five-digit numbers are there, if the two leftmost digits are even, the other digits are odd and the digit 4 cannot appear more than once in the number?


a) 1875
b) 2000
c) 2375
d) 2500
e) 3875


(4*5 -1)*5*5*5 =2375
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

Kudos [?]: 1102 [0], given: 5

Retired Moderator
User avatar
Joined: 18 Jul 2008
Posts: 959

Kudos [?]: 312 [0], given: 5

Re: five digit number [#permalink]

Show Tags

New post 27 Aug 2008, 15:11
Can you tell my why I'm wrong?

Even numbers are 0,2,4,6,8
Odd numbers are 1,3,5,7,9

# of five digit numbers w/o 4 = 3*4*5*5*5 = 1500

- w/o 4, I'd get = 4*4*5*5*5

# of five digit numbers w/ 4 as first digit = 1*4*5*5*5 = 500

For this, I get 1*4*5*5*5

# of five digit number w/ 4 as second digit = 3*1*5*5*5 = 375

For this, I get 4*1*5*5*5



zoinnk wrote:
Nihit wrote:
. How many five-digit numbers are there, if the two leftmost digits are even, the other digits are odd and the digit 4 cannot appear more than once in the number?


a) 1875
b) 2000
c) 2375
d) 2500
e) 3875


C

# of five digit numbers w/o 4 = 3*4*5*5*5 = 1500
# of five digit numbers w/ 4 as first digit = 1*4*5*5*5 = 500
# of five digit number w/ 4 as second digit = 3*1*5*5*5 = 375

Total = 1500+500+375

Kudos [?]: 312 [0], given: 5

Retired Moderator
User avatar
Joined: 18 Jul 2008
Posts: 959

Kudos [?]: 312 [0], given: 5

Re: five digit number [#permalink]

Show Tags

New post 27 Aug 2008, 17:01
I didn't think about the zero. Thanks!

Kudos [?]: 312 [0], given: 5

Re: five digit number   [#permalink] 27 Aug 2008, 17:01
Display posts from previous: Sort by

How many five-digit numbers are there, if the two leftmost

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderator: chetan2u



GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.