GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 Jan 2019, 11:29

### 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 January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### FREE Quant Workshop by e-GMAT!

January 20, 2019

January 20, 2019

07:00 AM PST

07:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.
• ### GMAT Club Tests are Free & Open for Martin Luther King Jr.'s Birthday!

January 21, 2019

January 21, 2019

10:00 PM PST

11:00 PM PST

Mark your calendars - All GMAT Club Tests are free and open January 21st for celebrate Martin Luther King Jr.'s Birthday.

# If ab = c where a, b, and c are positive integers

Author Message
TAGS:

### Hide Tags

Moderator
Joined: 21 Jun 2014
Posts: 1113
Location: India
Concentration: General Management, Technology
GMAT 1: 540 Q45 V20
GPA: 2.49
WE: Information Technology (Computer Software)
If ab = c where a, b, and c are positive integers  [#permalink]

### Show Tags

10 Mar 2017, 22:24
00:00

Difficulty:

25% (medium)

Question Stats:

91% (01:03) correct 9% (01:30) wrong based on 32 sessions

### HideShow timer Statistics

If ab = c where a, b, and c are positive integers and a and b are prime numbers, what is the value of b?

(1) c is even.

(2) a is odd.

_________________

---------------------------------------------------------------
Target - 720-740
Project PS Butler - https://gmatclub.com/forum/project-ps-butler-practice-everyday-280904.html
http://gmatclub.com/forum/information-on-new-gmat-esr-report-beta-221111.html
http://gmatclub.com/forum/list-of-one-year-full-time-mba-programs-222103.html

Senior Manager
Joined: 19 Apr 2016
Posts: 274
Location: India
GMAT 1: 570 Q48 V22
GMAT 2: 640 Q49 V28
GPA: 3.5
WE: Web Development (Computer Software)
Re: If ab = c where a, b, and c are positive integers  [#permalink]

### Show Tags

10 Mar 2017, 22:30
HKD1710 wrote:
If ab = c where a, b, and c are positive integers and a and b are prime numbers, what is the value of b?

(1) c is even.

(2) a is odd.

St I
c is even
for c to be even either a or b must be even ------------Insufficient

St II
a is odd. no information about b or c -------------Insufficient

Combining St I and II we have
c is even and a is odd , which mean b has to be even
since b is even and is prime, b must 2 -----------Sufficient

Hence option C is correct
Hit Kudos if you liked it
Re: If ab = c where a, b, and c are positive integers &nbs [#permalink] 10 Mar 2017, 22:30
Display posts from previous: Sort by