BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
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
Start Free 5-Day Trial Read 559 Reviews →

is [x] =0 ? (OG13)

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 435
Joined: Wed Nov 16, 2011 7:27 amFollowed by: 16 members
Thanked: 48 times
by alex.gellatly » Thu Aug 02, 2012 10:20 pm
If [x] denotes the least integer greater than or equal to x, is [x] =0 ?
(1) -1 < x < 1
(2) x < 0

Not really sure how to approach this one...
Thanks
A useful website I found that has every quant OG video explanation:

https://www.beatthegmat.com/useful-websi ... tml#475231
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 520
Joined: Sat Apr 28, 2012 9:12 pmFollowed by: 49 members
Thanked: 339 times
GMAT Score:770

by eagleeye » Fri Aug 03, 2012 3:27 am
alex.gellatly wrote:If [x] denotes the least integer greater than or equal to x, is [x] =0 ?
(1) -1 < x < 1
(2) x < 0

Not really sure how to approach this one...
Thanks
I read the question wrong earlier, i read it as less than or equal to. Thx vk.
Least integer greater than or equal to x means that:

If x = 2.99999, [x] = 3
If x = 2.01, [x] = 3
If x = -2.01, [x] = -2
If x = 0.01, [x] = 1
If x= 0.99, [x] =1
If x= 0, [x] = 0
If x = -0.00001, [x] = 0
If x= -0.99999, [x] = 0
We need to find if [x] = 0,
This is only possible if -1<x<=0
So, the question rephrases to Is -1<x<=0, with this in mind, let's see the options.

(1) -1 < x < 1
x can be less than 0 or greater than it, Insufficient.


(2) x < 0
clearly, x may be less than -1, Insufficient.
Together we, get
-1 <x<0. Sufficient
C is correct :)
Last edited by eagleeye on Fri Aug 03, 2012 4:24 am, edited 1 time in total.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 502
Joined: Tue Jun 03, 2008 11:36 pmFollowed by: 21 members
Thanked: 99 times

by vk_vinayak » Fri Aug 03, 2012 4:00 am
alex.gellatly wrote:If [x] denotes the least integer greater than or equal to x, is [x] =0 ?
(1) -1 < x < 1
(2) x < 0

Not really sure how to approach this one...
Thanks
According to definition, we need to rephrase the question Is -1 < x < 0? or x=0?

1. If x= -0.5 the [x]=0 and if x=0.5, then [x]=1. NOT SUFFICIENT.

2. x can be any -ve value. NOT .

1 and 2 combined, -1 < x < 0. SUFFICIENT. Hence answer is C.
- VK

I will (Learn. Recognize. Apply)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1