What is the source of this question? I'm getting E ....
for instance a = -2 and c = 4 b cannot be 2. this fulfill statements 1 and 2
Let's say b = 6 |-2| = 6 -4 true
let's say b= 7 |-2| = 7 -4 false
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
algebra ds
Source: Beat The GMAT — Data Sufficiency |
OG had same prob except the "NE" part
C is perfect
C is perfect
shilpi84 wrote:Is |a| = b - c ?
(1) a + c NE(not equal) b
(2) a < 0
OA:C
if you change the statement 1 the answer is C.nitya34 wrote:OG had same prob except the "NE" part
C is perfect
shilpi84 wrote:Is |a| = b - c ?
(1) a + c NE(not equal) b
(2) a < 0
OA:C
Here is the logic.
First step rephrase the question
Is |a| = b - c ?
if you have absolute value you have to consider several cases
first what is inside the absolute value is positive. In our case a >0
second what is inside the absolute value is negative. In our case a < 0
third what is inside the absolute value is 0. In our case a = 0
rewriting the equations
a > 0 ---> a = b - c
a < 0 ----> a = c-b
a = 0 ----> b = c
now take a look at the statements
1)
a + c = b ---> a = b - c
is this sufficient to assure that |a| = b -c? no because a = b -c only if a < 0
not sufficient
2) a < 0 tells nothing about b and c. not sufficient
both together
a < 0 and a = b - c, this is just one of the equations of the rephrasing. so is sufficient
