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

It is currently 22 Jul 2018, 04:03

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

Set A consists of five unique prime numbers. Which of the following

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

Hide Tags

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47168
Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 09 Apr 2018, 02:08
1
3
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

57% (00:41) correct 43% (00:34) wrong based on 93 sessions

HideShow timer Statistics

Set A consists of five unique prime numbers. Which of the following values, if added as a sixth term to Set A, must increase the range of Set A?

I. 0
II. 1
III. 100

A. I only
B. II only
C. III only
D. I and II only
E. II and III only

_________________

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

Senior Manager
Senior Manager
User avatar
G
Joined: 14 Feb 2018
Posts: 379
Re: Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 09 Apr 2018, 02:40
Since, the minimum possible prime number is 2, thus, 0 or 1 cannot be the 6 the term.

Thus, only possible number should be 100.

Thus, option C.

I am not sure, please correct me if I am wrong.

Sent from my Lenovo K53a48 using GMAT Club Forum mobile app
1 KUDOS received
Manager
Manager
User avatar
G
Joined: 16 Sep 2016
Posts: 225
WE: Analyst (Health Care)
Premium Member CAT Tests
Re: Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 09 Apr 2018, 02:47
1
Bunuel wrote:
Set A consists of five unique prime numbers. Which of the following values, if added as a sixth term to Set A, must increase the range of Set A?

I. 0
II. 1
III. 100

A. I only
B. II only
C. III only
D. I and II only
E. II and III only


Tricky question.

Set A consists of five unique prime numbers. Lowest possible element of the set could be 2. Highest possible element could be any large prime number.

To increase the range " Difference between the largest and smallest element of the set" : we need to either lower the lowest element or increase the largest one.

Hence adding either 0 or 1 to the set will surely increase it's range by at least 2 or 1 respectively.

We cannot say the same thing about 100, as the largest prime number already existing in the set could be larger than 100.

Hence Option (D) is our answer.

+1 Kudos if you liked the explanation :-D

Best,
Gladi
Manager
Manager
avatar
S
Joined: 30 May 2017
Posts: 118
Location: United States
Schools: HBS '21
GMAT 1: 690 Q50 V32
GRE 1: Q168 V164
GPA: 3.57
CAT Tests
Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 09 Apr 2018, 02:49
Bunuel wrote:
Set A consists of five unique prime numbers. Which of the following values, if added as a sixth term to Set A, must increase the range of Set A?

I. 0
II. 1
III. 100

A. I only
B. II only
C. III only
D. I and II only
E. II and III only




Only I (0) and II (1) will increase the range of set A. This is because minimum prime number is 2. Assume the prime numbers are 2,3,5, 97 and 109. Only I (0) and II (1) will increase the range of set A. III(100) will not increase the range. Therefore option "D" is the answer.
_________________

Kindly press the +1Kudos if you like the explanation. Thanks a lot!!!

Intern
Intern
User avatar
B
Status: GMAT in July 2018
Joined: 05 Mar 2018
Posts: 41
Location: India
Concentration: Leadership, Strategy
WE: Law (Consulting)
Re: Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 09 Apr 2018, 03:03
Only by adding 0 or 1 can we extend the range.. as unsure if the last prime number is less than 100..
Expert Post
Target Test Prep Representative
User avatar
G
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 2973
Location: United States (CA)
Re: Set A consists of five unique prime numbers. Which of the following  [#permalink]

Show Tags

New post 10 Apr 2018, 17:16
Bunuel wrote:
Set A consists of five unique prime numbers. Which of the following values, if added as a sixth term to Set A, must increase the range of Set A?

I. 0
II. 1
III. 100

A. I only
B. II only
C. III only
D. I and II only
E. II and III only


Since 1 and 0 are not prime and the lowest prime number is 2, 1 and 0 will increase the range.

100 will not necessarily increase the range. If the largest of the 5 prime numbers is 101, then the range won't increase, however, if the largest of the numbers is 97, then the range will increase.

Answer: D
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: Set A consists of five unique prime numbers. Which of the following &nbs [#permalink] 10 Apr 2018, 17:16
Display posts from previous: Sort by

Set A consists of five unique prime numbers. Which of the following

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

Events & Promotions

PREV
NEXT


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®.