GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Jul 2018, 05:49

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.

Close

Request Expert Reply

Confirm Cancel

If b is an integer, is a|a| < 2^b

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
S
Joined: 18 Nov 2013
Posts: 25
Reviews Badge CAT Tests
If b is an integer, is a|a| < 2^b  [#permalink]

Show Tags

New post Updated on: 14 Oct 2015, 09:47
3
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

77% (01:06) correct 23% (01:28) wrong based on 146 sessions

HideShow timer Statistics

If b is an integer, is \(a|a| < 2^b\)

1) b<0
2) a=b

Originally posted by harish1986 on 14 Oct 2015, 08:49.
Last edited by ENGRTOMBA2018 on 14 Oct 2015, 09:47, edited 1 time in total.
Formatted the question, added the OA and renamed the topic.
Expert Post
1 KUDOS received
SVP
SVP
User avatar
P
Joined: 08 Jul 2010
Posts: 2120
Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: If b is an integer, is a|a| < 2^b  [#permalink]

Show Tags

New post 14 Oct 2015, 09:18
1
1
harish1986 wrote:
Please provide an answer for the above. I guess its C.


Statement 1: b < 0

Case 1: @a=0.1, b=-1, a*IaI=0.01 and 2^b = 1/2, i.e. a*IaI < 2^b
Case 2: @a=1, b=-1, a*IaI=1 and 2^b = 1/2, i.e. a*IaI > 2^b

NOT SUFFICIENT

Statement 2: a=b
Case 1: @a=2, b=2, a*IaI=4 and 2^b = 4, i.e. a*IaI is NOT less than 2^b
Case 2: @a=-1, b=-1, a*IaI=-1 and 2^b = 1/2, i.e. a*IaI < 2^b

Combining the Two statements
if a=b and b < 0
then LHS i.e. a*IaI will always be Negative and RHS i.e. 2^b will always be positive hence,
a*IaI < 2^b
SUFFICIENT

Answer: Option C
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Expert Post
1 KUDOS received
SVP
SVP
User avatar
P
Joined: 08 Jul 2010
Posts: 2120
Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: If b is an integer, is a|a| < 2^b  [#permalink]

Show Tags

New post 14 Oct 2015, 09:19
1
harish1986 wrote:
Please provide an answer for the above. I guess its C.



Please read the posting rules and post DS question in appropriate Forum.

Also your posts should include answers as well (if you know them)

Engr2012 or Bunuel : Please shift this question to DS forum and edit the answer
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Current Student
avatar
S
Joined: 20 Mar 2014
Posts: 2641
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE: Engineering (Aerospace and Defense)
GMAT ToolKit User Premium Member Reviews Badge
Re: If b is an integer, is a|a| < 2^b  [#permalink]

Show Tags

New post 14 Oct 2015, 09:48
GMATinsight wrote:
harish1986 wrote:
Please provide an answer for the above. I guess its C.



Please read the posting rules and post DS question in appropriate Forum.

Also your posts should include answers as well (if you know them)

Engr2012 or Bunuel : Please shift this question to DS forum and edit the answer


Thanks. Moved to DS forum.
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 7326
Premium Member
Re: If b is an integer, is a|a| < 2^b  [#permalink]

Show Tags

New post 15 Aug 2017, 07:35
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 Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: If b is an integer, is a|a| < 2^b &nbs [#permalink] 15 Aug 2017, 07:35
Display posts from previous: Sort by

If b is an integer, is a|a| < 2^b

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


cron

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.