• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

If a*b is an even integer, is b a multiple of 2?

This topic has 1 expert reply and 0 member replies

Top Member

lheiannie07 Master | Next Rank: 500 Posts
Joined
07 Sep 2017
Posted:
100 messages

If a*b is an even integer, is b a multiple of 2?

Wed Sep 20, 2017 3:00 am
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
If a*b is an even integer, is b a multiple of 2?

(1) a is not a multiple of 2.
(2) b is product of two consecutive integers.

I'm quite confused about the statements, isn't Option D the right answer?

OA B

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!

GMAT/MBA Expert

Jay@ManhattanReview GMAT Instructor
Joined
22 Aug 2016
Posted:
703 messages
Followed by:
17 members
Thanked:
332 times
Wed Sep 20, 2017 3:21 am
lheiannie07 wrote:
If a*b is an even integer, is b a multiple of 2?

(1) a is not a multiple of 2.
(2) b is product of two consecutive integers.

I'm quite confused about the statements, isn't Option D the right answer?

OA B
Statement 1 itself is not sufficient.

Case 1: a = 2/3 and b = 3, then a*b = 2/3*3 = 2; thus, b is NOT a multiple of 2. The answer is No.

The question does not say that a and b are integers. They are numbers.

Case 2: a = 3 and b = 2, then a*b = 3*2 = 6 (even); thus, b is a multiple of 2. The answer is Yes.

Insufficient.

Hope this helps!

-Jay
__________________________________
Manhattan Review GMAT Prep

Locations: New York | Bangkok | Abu Dhabi | Rome | and many more...

Best Conversation Starters

1 Vincen 180 topics
2 lheiannie07 61 topics
3 Roland2rule 54 topics
4 ardz24 44 topics
5 VJesus12 14 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 Brent@GMATPrepNow

GMAT Prep Now Teacher

155 posts
2 Rich.C@EMPOWERgma...

EMPOWERgmat

105 posts
3 GMATGuruNY

The Princeton Review Teacher

101 posts
4 Jay@ManhattanReview

Manhattan Review

82 posts
5 Matt@VeritasPrep

Veritas Prep

80 posts
See More Top Beat The GMAT Experts