NEW HERE? LEARN MORE
closeclose
Last visit was: 26 Apr 2024, 01:56 It is currently 26 Apr 2024, 01:56
Decision Tracker
My Rewards
New posts
New comers' posts

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

Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280

SORT BY:
Date
Kudos
Tags:
Difficulty: Sub 505 Levelx   Inequalitiesx                  
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92929
Own Kudos [?]: 619094 [6]
Given Kudos: 81609
Send PM
CAT Tests Forum Quiz Mode
Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink] New post   23 Sep 2018, 21:08
6
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

82% (01:13) correct 18% (01:26) wrong based on 830 sessions
Hide Show timer Statistics
Is the number x between 0.2 and 0.7?

(1) 560x < 280
(2) 700x > 280
ShowHide Answer
Official Answer
C
User avatar
L
NandishSS
Director
Director
Joined: 06 Jan 2015
Posts: 738
Own Kudos [?]: 1586 [1]
Given Kudos: 579
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE:Information Technology (Computer Software)
Send PM
Re: Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink] New post   23 Sep 2018, 21:19
1
Bookmarks
Bunuel wrote:
Is the number x between 0.2 and 0.7?

(1) 560x < 280
(2) 700x > 280


Is the number x between 0.2 and 0.7?

Here (1) 560x < 280 ==> 560x < 280 = x< 0.5

This gives Case I) x=0.4 Gives Yes Case II) x=0.1 Gives No. Hence Not Suff

(2) 700x > 280 ==> 560x < 280 = x> 0.4

This gives Case I) x=0.5 Gives Yes Case II) x=0.8 Gives No. Hence Not Suff

Combining A & B x< 0.5 & x> 0.4

Hence C
avatar
B
Mauriciopettinato
Intern
Intern
Joined: 31 Mar 2019
Posts: 3
Own Kudos [?]: 1 [0]
Given Kudos: 15
Send PM
Re: Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink] New post   13 Aug 2019, 10:16
I would go for fraction approximation (for time efficiency):

a) 560x < 280 is close to: x < 300 / 600 or x < almost 0.5 (not sufficient alone)

b) 700 x > 280 is close to: x > 300 / 700 or x > little more than 0.5 (not sufficient alone)

A and B together: (a little less than 0.5) < x < (almost 0.5) -> sufficient
avatar
B
Riccardo2505
Intern
Intern
Joined: 12 Feb 2021
Posts: 9
Own Kudos [?]: 1 [0]
Given Kudos: 14
Send PM
Re: Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink] New post   16 Mar 2021, 08:44
I tried another approach but I'm not sure it's a valid one:

1) Gives information only about x<something --> not sufficient
2) Gives information only about x>something --> not sufficient

1+2) Here we know that something<x<something so it's not important to know precisely if x value is between 0.2 and 0.7, we have enough information to answer in both cases.
So my answer is C.
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32678
Own Kudos [?]: 822 [0]
Given Kudos: 0
Send PM
Re: Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink] New post   22 Nov 2022, 03:25
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
gmatclubot
Re: Is the number x between 0.2 and 0.7? (1) 560x < 280 (2) 700x > 280 [#permalink]
22 Nov 2022, 03:25
Moderator:
Bunuel
Math Expert
92922 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions