Last visit was: 27 Dec 2024, 02:17 It is currently 27 Dec 2024, 02:17
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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
PREVIOUS TOPIC
NEXT TOPIC

The number of prime numbers between 10 and 20

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30514
Own Kudos [?]: 36873 [0]
Given Kudos: 26112
Send PM
The number of prime numbers between 10 and 20 [#permalink] New post   24 Jun 2019, 11:18
Expert Reply
00:00

Question Stats:

96% (00:30) correct 3% (00:18) wrong based on 84 sessions

Hide Show timer Statistics

Quantity A
Quantity B
The number of prime numbers between 10 and 20
The number of prime numbers between 30 and 40


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
ShowHide Answer
Official Answer
A
User avatar
P
GreenlightTestPrep
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12238 [0]
Given Kudos: 136
Send PM

Top Member of the Month
Re: The number of prime numbers between 10 and 20 [#permalink] New post   25 Jun 2019, 05:14
Carcass wrote:
Quantity A
Quantity B
The number of prime numbers between 10 and 20
The number of prime numbers between 30 and 40


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.


Some primes: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41,....

There are 4 primes (11, 13, 17, and 19) between 10 and 20
There are 2 primes (31, 37) between 30 and 40

We get:
QUANTITY A: 4
QUANTITY B: 2

Answer: A

Cheers,
Brent
User avatar
arc601
Manager
Manager
Joined: 19 Nov 2018
Posts: 102
Own Kudos [?]: 159 [2]
Given Kudos: 0
Send PM

Top Member of the Month
Re: The number of prime numbers between 10 and 20 [#permalink] New post   17 Sep 2019, 10:19
1
1
Bookmarks
If one can remember 44 223 223 21
Then you know the number of primes for each row of numbers, for the 1's through all the tens.
Attachments

PrimeNumbersHundredsChart_1.jpg
PrimeNumbersHundredsChart_1.jpg [ 101.93 KiB | Viewed 7608 times ]

User avatar
G
BrushMyQuant
Moderator
Moderator
Joined: 02 Jan 2020
Status:GRE Quant Tutor
Posts: 1115
Own Kudos [?]: 974 [1]
Given Kudos: 9
Location: India
Concentration: General Management
Schools: XLRI Jamshedpur, India - Class of 2014
GMAT 1: 700 Q51 V31
GPA: 2.8
WE:Engineering (Computer Software)
Send PM
The number of prime numbers between 10 and 20 [#permalink] New post   18 Jul 2022, 08:44
1
Quantity A: The number of prime numbers between 10 and 20

Prime numbers between 10 and 20 are 11, 13, 17, 19 => 4

Quantity B: The number of prime numbers between 30 and 40

Prime numbers between 30 and 40 are 31, 37=> 2

Clearly, Quantity A(4) > Quantity B(2)

So, Answer will be A.
Hope it helps!

Watch the following video to learn How to find Prime Numbers from 1 to 100

Prep Club for GRE Bot
gmatclubot
The number of prime numbers between 10 and 20 [#permalink]
18 Jul 2022, 08:44
Moderators:
adewale223
GRE Instructor
88 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1115 posts
VibhuAnurag
GRE Instructor
234 posts

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

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact