IMO C.
Statement 1. X can be less the 0.5 and still make the statement true, such as x = 0.1, 80<620
Insufficient
Statement 2. X can be anywhere 0.51X to 1,1.5,2, 2.46643 etc and still make the statement true. Again Insufficient.
Taking the two statements together, X is somewhere between .51 < X < .78
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
nmber properties
Source: Beat The GMAT — Data Sufficiency |
-
gmatboost
- Master | Next Rank: 500 Posts
- Posts: 312
- Location: New York City
- Thanked: 130 times
- GMAT Score:780
Let's give it a shot without finding the exact decimal values of the fractions.
Statement 1:
800x < 620
x < 620/800
x < 62/80
x < 31/40
You should recognize that 31/40 is just a little more than 3/4.
[spoiler]This means x may or may not be between 0.5 and 0.9. Insufficient.
[/spoiler]
Statement 2:
1200x > 620
x > 620/1200
x > 62/120
x > 31/60
You should recognize that 31/60 is just a little more than 1/2.
This means x may or may not be between 0.5 and 0.9. Insufficient.
Combined:
[spoiler]0.5 < 31/60 < x < 31/40 < 0.9. Sufficient.[/spoiler]
Statement 1:
800x < 620
x < 620/800
x < 62/80
x < 31/40
You should recognize that 31/40 is just a little more than 3/4.
[spoiler]This means x may or may not be between 0.5 and 0.9. Insufficient.
[/spoiler]
Statement 2:
1200x > 620
x > 620/1200
x > 62/120
x > 31/60
You should recognize that 31/60 is just a little more than 1/2.
This means x may or may not be between 0.5 and 0.9. Insufficient.
Combined:
[spoiler]0.5 < 31/60 < x < 31/40 < 0.9. Sufficient.[/spoiler]
Greg Michnikov, Founder of GMAT Boost
GMAT Boost offers 250+ challenging GMAT Math practice questions, each with a thorough video explanation, and 100+ GMAT Math video tips, each 90 seconds or less.
It's a total of 20+ hours of expert instruction for an introductory price of just $10.
View sample questions and tips without signing up, or sign up now for full access.
Also, check out the most useful GMAT Math blog on the internet here.
GMAT Boost offers 250+ challenging GMAT Math practice questions, each with a thorough video explanation, and 100+ GMAT Math video tips, each 90 seconds or less.
It's a total of 20+ hours of expert instruction for an introductory price of just $10.
View sample questions and tips without signing up, or sign up now for full access.
Also, check out the most useful GMAT Math blog on the internet here.
-
krishnasty
- Master | Next Rank: 500 Posts
- Posts: 142
- Thanked: 19 times
IMO C
From 1,
x < .77
INSUFFICIENT
From 2,
x > .51
INSUFFICIENT
Combining both, .77>x>.51
Hence, SUFFICIENT
From 1,
x < .77
INSUFFICIENT
From 2,
x > .51
INSUFFICIENT
Combining both, .77>x>.51
Hence, SUFFICIENT
---------------------------------------
Appreciation in thanks please!!
Appreciation in thanks please!!
