Last visit was: 22 May 2024, 19:05 It is currently 22 May 2024, 19:05

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.

Close

Request Expert Reply

Confirm Cancel
User avatar
Retired Moderator
Joined: 07 Jun 2014
Posts: 4810
Own Kudos [?]: 10638 [7]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Most Helpful Expert Reply
User avatar
Retired Moderator
Joined: 07 Jun 2014
Posts: 4810
Own Kudos [?]: 10638 [5]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
Most Helpful Community Reply
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 11748 [6]
Given Kudos: 136
Send PM
General Discussion
avatar
Intern
Intern
Joined: 24 Sep 2018
Posts: 31
Own Kudos [?]: 3 [0]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
is there another way to do this ? faster maybe..
avatar
Intern
Intern
Joined: 08 Apr 2019
Posts: 1
Own Kudos [?]: 0 [0]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
-2,-3 and -5 are also prime numbers and satisfy the equation as they have not specified only positive integers why not take the negative as well?
User avatar
Senior Manager
Senior Manager
Joined: 10 Feb 2020
Posts: 496
Own Kudos [?]: 338 [0]
Given Kudos: 299
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
1
akshata96 wrote:
-2,-3 and -5 are also prime numbers and satisfy the equation as they have not specified only positive integers why not take the negative as well?


Prime numbers are never negative
in any case, because of mod sign the numbers will become positive
avatar
Intern
Intern
Joined: 03 May 2020
Posts: 41
Own Kudos [?]: 17 [4]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
4
Simplifying the equation will give:
x^​2+5x-50<=0
When equated to 0, the values for x will be 5 and -10.
Since prime numbers can not be negative, eliminate 10.
Now prime numbers less than 5 i.e. 2 and 3 when substituted in that equation will make it negative thereby satisfying the equation.
Hence the required values are 2, 3, and 5.
Average = 2+3+5/3= 10/3
avatar
Manager
Manager
Joined: 29 Apr 2020
Posts: 67
Own Kudos [?]: 9 [0]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
why 1 is not considered? It is also a prime number
avatar
Manager
Manager
Joined: 27 Nov 2019
Posts: 78
Own Kudos [?]: 189 [1]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
1
Nikhil4GRE wrote:
why 1 is not considered? It is also a prime number


1 is neither prime nor composite

Prime numbers have exactly 2 positive integer factors

Composite numbers have more than 2 positive integer factors

1 has only one factor

So neither prime nor composite
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 4511
Own Kudos [?]: 68 [0]
Given Kudos: 0
Send PM
Re: If x equals all prime numbers that satisfy the inequality [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep 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.
Prep Club for GRE Bot
[#permalink]
Moderators:
Moderator
1085 posts
GRE Instructor
218 posts

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