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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

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

Show Tags

24 May 2007, 19:18

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

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

HideShow timer Statictics

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?

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

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

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!

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

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