Last visit was: 17 Sep 2026, 10:02 It is currently 17 Sep 2026, 10:02
Home
Messages
Tests
Schools
Events
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
avatar
fozzzy
avatar
Joined: 29 Nov 2012
Last visit: 17 May 2015
Posts: 573
Own Kudos:
7,202
 [10]
Given Kudos: 543
Posts: 573
Kudos: 7,202
 [10]
For any integer x, [x] is defined by the equation [x] = x + Updated on: 06 Jul 2013, 08:19
Originally posted by fozzzy on 06 Jul 2013, 07:10.
Last edited by Bunuel on 06 Jul 2013, 08:19, edited 1 time in total.
Edited the question.
Kudos
Add Kudos
10
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

35% (medium)

Question Stats:

68% (01:39) correct 32% (01:46) wrong based on 262 sessions

History

Date
Time
Result
Not Attempted Yet
For any integer x, [x] is defined by the equation [x] = x + 1. which of the following is equal to

A. 0
B. 2
C. -2x-
D. 2x
E. 2x-

I'm not sure how to write this question down over here as it has different functions! Attached image. Kindly provide Explanations. Thanks!
ShowHide Answer
Official Answer
D

Attachments

Question.jpg
Question.jpg [ 12.91 KiB | Viewed 5912 times ]

User avatar
Zarrolou
User avatar
Joined: 02 Sep 2012
Last visit: 11 Dec 2013
Posts: 840
Own Kudos:
5,229
 [3]
Given Kudos: 219
Status:Far, far away!
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Posts: 840
Kudos: 5,229
 [3]
For any integer x, [x] is defined by the equation [x] = x + 06 Jul 2013, 07:14
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
\(([x])^2=(x+1)^2\)
\([x^2]=x^2+1\)

\(([x])^2-[x^2]=x^2+2x+1-x^2-1=2x\)
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 17 Sep 2026
Posts: 113,625
Own Kudos:
841,897
 [1]
Given Kudos: 111,611
Products:
GMAT Club Tests
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,625
Kudos: 841,897
 [1]
For any integer x, [x] is defined by the equation [x] = x + 06 Jul 2013, 08:23
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
fozzzy
For any integer x, [x] is defined by the equation [x] = x + 1. which of the following is equal to

A. 0
B. 2
C. -2x-
D. 2x
E. 2x-

I'm not sure how to write this question down over here as it has different functions! Attached image. Kindly provide Explanations. Thanks!
Show more


DS Functions and Custom Characters questions: search.php?search_id=tag&tag_id=40
PS Functions and Custom Characters questions: search.php?search_id=tag&tag_id=61

Recently bumped questions fro this category: new-project-review-discuss-and-get-kudos-points-153555.html#p1238175

Hope it helps.
User avatar
gps5441
User avatar
Joined: 04 May 2014
Last visit: 03 Feb 2018
Posts: 106
Own Kudos:
83
Given Kudos: 126
Location: India
WE:Sales (Mutual Funds and Brokerage)
Posts: 106
Kudos: 83
For any integer x, [x] is defined by the equation [x] = x + 18 Oct 2017, 03:09
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Plugin in value of x
Let x=2
representing x bar with=Ẍ =x+1
\((Ẍ)^2\)-{\((x)^2\)}- this part the one in the curly bracket the value of x has to be first squared and then represented in Ẍ form(\((2)^2\)+1)
\((2+1)^2\)-(4+1)
\((3)^2\)-(5)=4
9-5=4
now put x=2 in the given answer choices only 2x=4 answer D.
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,225
Own Kudos:
1,160
Posts: 39,225
Kudos: 1,160
For any integer x, [x] is defined by the equation [x] = x + 22 Jan 2025, 01:58
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderator:
Bunuel
Math Expert
113625 posts