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

It is currently 15 Dec 2018, 13:21

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
Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • $450 Tuition Credit & Official CAT Packs FREE

     December 15, 2018

     December 15, 2018

     10:00 PM PST

     11:00 PM PST

    Get the complete Official GMAT Exam Pack collection worth $100 with the 3 Month Pack ($299)
  • FREE Quant Workshop by e-GMAT!

     December 16, 2018

     December 16, 2018

     07:00 AM PST

     09:00 AM PST

    Get personalized insights on how to achieve your Target Quant Score.

If George had 16 more textbooks, he would have three times

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

Hide Tags

Intern
Intern
avatar
Joined: 07 Oct 2012
Posts: 14
Reviews Badge
If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 27 Dec 2012, 08:56
2
3
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

62% (02:09) correct 38% (01:58) wrong based on 236 sessions

HideShow timer Statistics

If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks
Director
Director
User avatar
G
Status: Tutor - BrushMyQuant
Joined: 05 Apr 2011
Posts: 610
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 700 Q51 V31
GPA: 3
WE: Information Technology (Computer Software)
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 27 Dec 2012, 09:07
3
tim415 wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks


Suppose George has G books and Ann has A books then
G + 16 = 3A
is G > A?

STAT1: A > 5
G = 3A - 16 if A is 2000 then G = 6000 - 16 > 2000 (> A)
But if A = 6 then G = 2, so G < A
so, NOT SUFFICIENT

STAT2: G < 8
G + 16 = 3A => G = 3A -16 < 8
3A < 24
A < 8
For Any value of A < 8 G will be always less than A
A = 7 => G = 3*7 - 16 = 5
A = 6 => G = 3*6 - 16 = 2
A = 5 or less will give negative values of G so not possible
Hence G < A
so, SUFFICIENT.
Hence answer will be B
Hope it helps!
_________________

Ankit

Check my Tutoring Site -> Brush My Quant

GMAT Quant Tutor
How to start GMAT preparations?
How to Improve Quant Score?
Gmatclub Topic Tags
Check out my GMAT debrief

How to Solve :
Statistics || Reflection of a line || Remainder Problems || Inequalities

Retired Moderator
User avatar
B
Joined: 05 Jul 2006
Posts: 1723
GMAT ToolKit User Premium Member
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 27 Dec 2012, 15:31
tim415 wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks


George = x, Ann = (x+16)/3

question: is x>(x+16)/3 i.e. is x>8

from 1
x+16>15,i.e. x>-1...not suff

from 2
x<8...suff

B
Intern
Intern
avatar
Joined: 18 Dec 2012
Posts: 1
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 28 Dec 2012, 07:56
But if George had 0 books, this doesn't work and the answer would be E
Manager
Manager
User avatar
Joined: 24 Sep 2012
Posts: 83
Location: United States
Concentration: Entrepreneurship, International Business
GMAT 1: 730 Q50 V39
GPA: 3.2
WE: Education (Education)
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 20 Feb 2013, 18:33
1
tbhagnari wrote:
But if George had 0 books, this doesn't work and the answer would be E


Consider that George had 0 books. If he had 16 more books, the total number of books would be 16. This would be equal to 3 times the number of books Ann has. 16=3(Ann's books)

Hence, Ann's books=16/3

This is a decimal. One cannot have books in decimal and thus George cannot have 0 books.

Hope that helps.
Retired Moderator
User avatar
B
Joined: 05 Jul 2006
Posts: 1723
GMAT ToolKit User Premium Member
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 22 Feb 2013, 03:42
tim415 wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks



if x+16=3y,i.e. if x = 3y-16, is x>y

from 1 , y>5, using w.c.s put y = 6 (no half books are allowed) then x = 2 and y>x put y = 200 then x = 584 and x>y..insuff

from 2

x<8 , y or and x has to be whole numbers ( i.e. books) thus what ever values x takes x+16 has to be a multiple of 3 ,i.e. x+16= ( x= 2, 5) , in all cases y is always greater ........suff

B
Intern
Intern
User avatar
Joined: 20 Feb 2013
Posts: 20
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 22 Feb 2013, 04:43
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks

This question can be done using algebra.

G + 16 = 3A

Statement (1):
If A = 6 then G = 2 (NO: George does not have more textbooks than Ann)
If A = 12 then G = 20 (YES: George have more textbooks than Ann)

Since we got a Yes and a No then means this statement is insufficient to give us a clear answer.


Statement (2): (Let us try to give George the maximum number of notebooks)
If G = 5 then A = 7 (NO: George does not have more textbooks than Ann)
Even after having maximum number of notebooks George has less notebooks than Anne, hence in every case George will have less notebooks than Anne. Hence the answer is (B)
_________________

Pushpinder Gill

Intern
Intern
User avatar
Joined: 19 Jan 2016
Posts: 45
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 21 Aug 2016, 06:22
tim415 wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks



I don't agree with the answer. Please clarify the mistake in my reasoning, Veritas

Assume number of Geogre's books = G
number of Ann's books = A

==> G + 16 = 3A ==> G - A = 2A - 16
G - A > 0 ONLY IF 2A - 16> 0 or A > 8
G - A < 0 ONLY IF 2A- 16 <0 or A < 8

(1) or/and (2) are not sufficient.
_________________

---------------------------------------------------------
Please kudos me if this helps. Thank you.

Intern
Intern
avatar
Joined: 12 Dec 2016
Posts: 10
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 20 Mar 2017, 09:23
I don't understand why 2 can't work for the information (B) ?

2+16 = 18 books, and then Anna may have 6 books.
Is there some point i missed in the mathematical calculation , or cold anyone please clarify whe 5+16 ==> works , but 2+16>> 6 does not work?
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51218
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 20 Mar 2017, 10:09
2
mesutthefail wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks


I don't understand why 2 can't work for the information (B) ?

2+16 = 18 books, and then Anna may have 6 books.
Is there some point i missed in the mathematical calculation , or cold anyone please clarify whe 5+16 ==> works , but 2+16>> 6 does not work?


If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

If George had 16 more textbooks, he would have three times as many textbooks as Ann does: G + 16 = 3A (A = (G + 16)/3)

Is G > A?
Is G > (G + 16)/3?
Is G > 8?

(1) Ann has more than 5 textbooks. If A = 6, then G = 2 < 8 but if A = 10, then G = 14 > 8. Not sufficient.

(2) George has fewer than 8 textbooks. Directly answers the question. Sufficient.

Answer: B.

Hope it's clear.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Intern
Intern
avatar
Joined: 12 Dec 2016
Posts: 10
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 20 Mar 2017, 23:47
Bunuel wrote:
mesutthefail wrote:
If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

(1) Ann has more than 5 textbooks
(2) George has fewer than 8 textbooks


I don't understand why 2 can't work for the information (B) ?

2+16 = 18 books, and then Anna may have 6 books.
Is there some point i missed in the mathematical calculation , or cold anyone please clarify whe 5+16 ==> works , but 2+16>> 6 does not work?


If George had 16 more textbooks, he would have three times as many textbooks as Ann does. Does George have more textbooks than Ann has?

If George had 16 more textbooks, he would have three times as many textbooks as Ann does: G + 16 = 3A (A = (G + 16)/3)

Is G > A?
Is G > (G + 16)/3?
Is G > 8?

(1) Ann has more than 5 textbooks. If A = 6, then G = 2 < 8 but if A = 10, then G = 14 > 8. Not sufficient.

(2) George has fewer than 8 textbooks. Directly answers the question. Sufficient.

Answer: B.

Hope it's clear.



Thank you. I'M so frustrated of nowadays(due to studying) so i'm making a lot of simple mistakes like this. :<
Intern
Intern
avatar
B
Joined: 29 Oct 2016
Posts: 26
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 26 Dec 2017, 17:26
I tried testing values for statement 2 but I got stuck:

If George has less than 8, let's say 7. Then 7 + 16 = 3A, which gives us A = 23/3. Ann cannot have half of a textbook, so if we estimate this as a whole number, we get 7. I took this as then A = G, meaning both George and Ann have 7 textbooks...so I chose insufficient for statement 2 as well. Can someone tell me where I am going wrong?

Thanks!
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51218
Re: If George had 16 more textbooks, he would have three times  [#permalink]

Show Tags

New post 26 Dec 2017, 19:55
1
infinitemac wrote:
I tried testing values for statement 2 but I got stuck:

If George has less than 8, let's say 7. Then 7 + 16 = 3A, which gives us A = 23/3. Ann cannot have half of a textbook, so if we estimate this as a whole number, we get 7. I took this as then A = G, meaning both George and Ann have 7 textbooks...so I chose insufficient for statement 2 as well. Can someone tell me where I am going wrong?

Thanks!


The question translates "is G > 8". (2) says G < 8, so we have a NO answer to the question, which means that (2) is sufficient.

Next, George cannot have 7 textbooks, yes, but he could have 5, or 2 (fewer than 8).

Check complete solution here: https://gmatclub.com/forum/if-george-ha ... l#p1823500
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

GMAT Club Bot
Re: If George had 16 more textbooks, he would have three times &nbs [#permalink] 26 Dec 2017, 19:55
Display posts from previous: Sort by

If George had 16 more textbooks, he would have three times

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


Copyright

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®.