Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 29 Sep 2016, 10:27

### 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

# Events & Promotions

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

# Qn 266. If the two-digit integers M and N are positive and

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 29 Apr 2003
Posts: 93
Location: Singapore
Followers: 1

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

Qn 266. If the two-digit integers M and N are positive and [#permalink]

### Show Tags

20 Jan 2004, 07:35
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Qn 266.

If the two-digit integers M and N are positive and have the same digits, but in reverse order, which of the following CANNOT be the sum of M and N?

a. 181
b. 165
c. 121
d. 99
e. 44

The answer is 181, and can anyone show a standard working in deriving the answer?
Intern
Joined: 20 Jan 2004
Posts: 19
Location: KZ
Followers: 0

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

[#permalink]

### Show Tags

20 Jan 2004, 08:25
The crack technique is the following:
1) M is A tens plus B units, then M=10*A+B;
2) N is B tens plus A units, then N=10*B+A;
3) M+N=(10*A+B)+(10*B+A)=11*A+11*B=11*(A+B)
4) so the sum of M and N must be divisible by 11.

How to reveal the right answer since now is easy, isn't it?

The all answers except for 181 are divisible by 11.

That's the point.
Manager
Joined: 26 Dec 2003
Posts: 227
Location: India
Followers: 1

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

[#permalink]

### Show Tags

20 Jan 2004, 14:17
I checked each and every answer choices, I guess its much easier. 165=87+78, 121=74+47, 99=45+54 and 44=22+22
[#permalink] 20 Jan 2004, 14:17
Display posts from previous: Sort by

# Qn 266. If the two-digit integers M and N are positive and

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO 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®.