-
alexdallas
- Master | Next Rank: 500 Posts
- Posts: 108
- Joined: Sun Mar 15, 2009 2:04 pm
I got A. None.alexdallas wrote:any ideas?
thanks
I just plugged in 6 and 5 into all the equations and didn't get a single even one.
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
If k and t are integers
Source: Beat The GMAT — Problem Solving |
I just plugged in 6 and 5 into all the equations and didn't get a single even one.
you can rephrase the question stem. if k^2-t^2 is odd, then one variable is even and one variable is odd.
i. if one variable is even and one variable is odd, k+t is odd + 2 is odd again
ii. k+t must be odd so squared, will still be odd
iii. one variable is odd, so added together, answer will be odd.
answer= none
i. if one variable is even and one variable is odd, k+t is odd + 2 is odd again
ii. k+t must be odd so squared, will still be odd
iii. one variable is odd, so added together, answer will be odd.
answer= none
