It is currently 17 Nov 2017, 12:55

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# AB+CD = AAA ,where AB and CD are two digit numbers and AAA

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Director
Joined: 03 Sep 2006
Posts: 865

Kudos [?]: 1104 [0], given: 33

AB+CD = AAA ,where AB and CD are two digit numbers and AAA [#permalink]

### Show Tags

24 May 2007, 19:18
00:00

Difficulty:

(N/A)

Question Stats:

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

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

AB+CD = AAA ,where AB and CD are two digit numbers and AAA is a three digit number; A,B,C,and D are distinct postive integers. In the addition problem above,what is the value of C?

( A ) 1

( B ) 3

( C ) 7

( D ) 9

Kudos [?]: 1104 [0], given: 33

Senior Manager
Joined: 03 May 2007
Posts: 270

Kudos [?]: 14 [0], given: 0

### Show Tags

24 May 2007, 19:39
AB+CD = AAA ,where AB and CD are two digit numbers and AAA is a three digit number; A,B,C,and D are distinct postive integers. In the addition problem above,what is the value of C?

the maximum three digit number can be 97+86=183 => A is 1 and the number is 111
we have 1B+CD=111 B can't be 0 or 1

B=3 => 98
B=4 => 97
....
B=9 => 92

in any case C is 9

Kudos [?]: 14 [0], given: 0

Manager
Joined: 18 Sep 2006
Posts: 58

Kudos [?]: 2 [0], given: 0

### Show Tags

24 May 2007, 19:44
This is a tough question, but I think the answer is 9. My reasoning is as follows

AB, CD are two 2 digit numbers, and AAA is a 3 digit number, so adding two 2 digit numbers can only give you AAA = 111 because A, B, C, D are to be distinct.
From this, we know that A = 1 so AB = 1B where B could be 0,2,3,4,5,6,7,8,9.
In any case, we wont worry about B at this stage. Now thinking logically, the only way we can get a result of 111 (AAA) is by adding a number in the nineties with a number in the tens, therefore, C = 9.
For example, A = 1, B = 7, D = 4, C= 9
therefore, AB + CD = 17(AB)+94(CD) = 111 (AAA)
I hope this helps

Kudos [?]: 2 [0], given: 0

Manager
Joined: 18 Sep 2006
Posts: 58

Kudos [?]: 2 [0], given: 0

### Show Tags

24 May 2007, 19:45
haha..Sergey_is_cool beat me to the answer!!...grrrr

Kudos [?]: 2 [0], given: 0

Senior Manager
Joined: 03 May 2007
Posts: 270

Kudos [?]: 14 [0], given: 0

### Show Tags

24 May 2007, 19:47

yeah you have to quick on this forum

Kudos [?]: 14 [0], given: 0

Manager
Joined: 18 Sep 2006
Posts: 58

Kudos [?]: 2 [0], given: 0

### Show Tags

24 May 2007, 20:02
haha..i know...i might as well think faster too...while m at it!!

Kudos [?]: 2 [0], given: 0

Director
Joined: 03 Sep 2006
Posts: 865

Kudos [?]: 1104 [0], given: 33

### Show Tags

25 May 2007, 00:35
saurster wrote:
haha..i know...i might as well think faster too...while m at it!!

Sergey and Saurster..you guys seem to be doing too good!!! Are you guys already done with GMAT or yet to appear for it? Seems you are in 780+ league!
ANy suggestions on how to improve CR and RC. THough I assume, CR should be natural!

Kudos [?]: 1104 [0], given: 33

Senior Manager
Joined: 03 May 2007
Posts: 270

Kudos [?]: 14 [0], given: 0

### Show Tags

25 May 2007, 06:17
LM wrote:
saurster wrote:
haha..i know...i might as well think faster too...while m at it!!

Sergey and Saurster..you guys seem to be doing too good!!! Are you guys already done with GMAT or yet to appear for it? Seems you are in 780+ league!
ANy suggestions on how to improve CR and RC. THough I assume, CR should be natural!

To be honest I'm a college student who is graduating in 3 semesters. I started studying for GMAT about a 1.5 months ago. When I took my first diagnostics test (OG 11) I got 2 out 24 questions correct. Since then I've been studying every day (2-4hours a day) and my math improved a lot. I'm taking GMAT in 2-3 months. English is my second language so I'll need more time preparing for my Verbal. I haven't started studying for my Verbal yet, so I can't really give you any advice I have a lot of prep material and posted it for you guys at http://www.gmatclub.com/phpbb/viewtopic ... 7&start=20
There are a lot of good notes posted by people who scored high. I'd recommend to read those notes, there are some good suggestion on how to improve your RC and CR.
Hopefully it helps.
Sergey

Kudos [?]: 14 [0], given: 0

VP
Joined: 08 Jun 2005
Posts: 1143

Kudos [?]: 254 [0], given: 0

### Show Tags

25 May 2007, 06:36
Sergey_is_cool wrote:
LM wrote:
saurster wrote:
haha..i know...i might as well think faster too...while m at it!!

Sergey and Saurster..you guys seem to be doing too good!!! Are you guys already done with GMAT or yet to appear for it? Seems you are in 780+ league!
ANy suggestions on how to improve CR and RC. THough I assume, CR should be natural!

To be honest I'm a college student who is graduating in 3 semesters. I started studying for GMAT about a 1.5 months ago. When I took my first diagnostics test (OG 11) I got 2 out 24 questions correct. Since then I've been studying every day (2-4hours a day) and my math improved a lot. I'm taking GMAT in 2-3 months. English is my second language so I'll need more time preparing for my Verbal. I haven't started studying for my Verbal yet, so I can't really give you any advice I have a lot of prep material and posted it for you guys at http://www.gmatclub.com/phpbb/viewtopic ... 7&start=20
There are a lot of good notes posted by people who scored high. I'd recommend to read those notes, there are some good suggestion on how to improve your RC and CR.
Hopefully it helps.
Sergey

Sergey - I like your avatar ! nice

Kudos [?]: 254 [0], given: 0

25 May 2007, 06:36
Display posts from previous: Sort by

# AB+CD = AAA ,where AB and CD are two digit numbers and AAA

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.