Hi oquiella,
This question can be solved with a mix of TESTing VALUES and/or Number Properties.
We're told that X and Y are POSITIVE INTEGERS. We're asked if Y is ODD. This is a YES/NO question.
1) X is ODD.
This tells us NOTHING about the value of Y. Y could be odd (and the answer to the question is YES) or even (and the answer to the question is NO).
Fact 1 is INSUFFICIENT
2) XY is ODD.
For the product to be ODD, BOTH X and Y must be odd.
For example:
(3)(5) = 15 = odd
(3)(4) = 12 = NOT odd
(2)(4) = 8 = NOT odd
Thus, Y is ALWAYS ODD and the answer to the question is ALWAYS YES.
Fact 2 is SUFFICIENT
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course
Redeem
Featured Course
Target Test Prep GMAT OnDemand
Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.
- 715+ score guarantee — highest in the industry (99th percentile)
- 52 chapters · 1,500+ lessons · 4,000+ practice questions
- 400 hours of video · 1,500+ instructor-led HD smartboard lessons
- 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
- 24/7 live support + weekly Zoom office hours with GMAT instructors
- TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
- 1,200+ flashcards + AI-powered study assistant & daily calendar
- OnDemand, LiveTeach & GMAT Bootcamp formats available
- Also: GRE, SAT Math & Executive Assessment courses
- MBA Admissions Consulting now available
- 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
- 200,000+ students served
- 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★
5.0
(559 reviews)
130-pt guarantee
$0 to start
then $127/mo
AS # 6
Source: Beat The GMAT — Data Sufficiency |
GMAT/MBA Expert
-
[email protected]
- Elite Legendary Member
- Posts: 10392
- Location: Palo Alto, CA
- Thanked: 2867 times
- GMAT Score:800
