Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 10:00

### 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

# If a and b are positive integers such that a-b and a/b

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 13 May 2005
Posts: 3
Followers: 0

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

If a and b are positive integers such that a-b and a/b [#permalink]

### Show Tags

04 Jul 2005, 03:34
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.

If a and b are positive integers such that a-b and a/b are both even integers, which of the following must be an odd integer ??

A a/2
B b/2
C (a+b)/2
D (a+2)/2
E (b+2)/2

Thanks...
_________________

cheebinn

Intern
Joined: 23 May 2005
Posts: 4
Followers: 0

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

### Show Tags

04 Jul 2005, 05:38
Answer is C.
But I plugged in values and got.....maybe someone can give a proper explanation
Senior Manager
Joined: 17 Apr 2005
Posts: 373
Location: India
Followers: 1

Kudos [?]: 27 [0], given: 0

### Show Tags

04 Jul 2005, 06:10
I got D.

a must be a multiple of 4. hence (a + 2)/2 = (4k + 2)/2 = 2k + 1 which is always odd.

HMTG.
Director
Joined: 27 Dec 2004
Posts: 901
Followers: 1

Kudos [?]: 45 [0], given: 0

### Show Tags

04 Jul 2005, 07:28
Pluggin in numbers doesn't seem to solve this.
For a/b to be even, both a and b has to be even or a even(such as 10) and b odd (such as 5).

but 10 -5 is not even.
Is there a trick to this question?
Manager
Joined: 05 May 2005
Posts: 92
Location: Kyiv, Ukraine
Followers: 1

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

### Show Tags

05 Jul 2005, 10:55
it looks like C, D, and E all can be the answers... weird.
Intern
Joined: 09 Jun 2005
Posts: 6
Location: Hong Kong
Followers: 0

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

### Show Tags

05 Jul 2005, 11:06
HowManyToGo wrote:
I got D.

a must be a multiple of 4. hence (a + 2)/2 = (4k + 2)/2 = 2k + 1 which is always odd.

HMTG.

very good explanation. Thanks HMTG.

D hits the point of the question "which of the following must be an odd integer ?? "

E is ruled out since (b+2)/2 is even in some situations, try b = 2, 6, 22, 26, 32, 36.....to any value ended up with last digit of 2 or 6)
Senior Manager
Joined: 30 May 2005
Posts: 276
Followers: 1

Kudos [?]: 40 [0], given: 0

### Show Tags

05 Jul 2005, 15:21
aowaowb wrote:
HowManyToGo wrote:
I got D.

a must be a multiple of 4. hence (a + 2)/2 = (4k + 2)/2 = 2k + 1 which is always odd.

HMTG.

very good explanation. Thanks HMTG.

D hits the point of the question "which of the following must be an odd integer ?? "

E is ruled out since (b+2)/2 is even in some situations, try b = 2, 6, 22, 26, 32, 36.....to any value ended up with last digit of 2 or 6)

plz do you have The OA
one thing for sure is that a and b must be either both even or both odd
so if you pick a=2 IN answer d (a+2)/2= 4/2 =2 this is a tricky question

'
05 Jul 2005, 15:21
Display posts from previous: Sort by

# If a and b are positive integers such that a-b and a/b

 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®.