Last visit was: 15 Jul 2024, 00:37 It is currently 15 Jul 2024, 00:37
Toolkit
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

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.

# If x and y are prime numbers, then which one of the following cannot

SORT BY:
Tags:
Show Tags
Hide Tags
Math Expert
Joined: 02 Sep 2009
Posts: 94342
Own Kudos [?]: 640890 [3]
Given Kudos: 85011
Math Expert
Joined: 02 Sep 2009
Posts: 94342
Own Kudos [?]: 640890 [1]
Given Kudos: 85011
Director
Joined: 04 Dec 2015
Posts: 620
Own Kudos [?]: 1614 [1]
Given Kudos: 276
Location: India
Concentration: Technology, Strategy
WE:Information Technology (Consulting)
CEO
Joined: 26 Feb 2016
Posts: 2865
Own Kudos [?]: 5312 [1]
Given Kudos: 47
Location: India
GPA: 3.12
Re: If x and y are prime numbers, then which one of the following cannot [#permalink]
1
Kudos
Of the available prime numbers, only 2 is an even number.
Baring this number the rest of the primes are all odd.
Also, the difference between two odd number cannot be odd.

13 can be achieved only by subtracting 2 from an odd number(which is 15)
But, 15 in not prime. (Hence x-y = 13 is not possible) (Option C)
Non-Human User
Joined: 09 Sep 2013
Posts: 33969
Own Kudos [?]: 851 [0]
Given Kudos: 0
Re: If x and y are prime numbers, then which one of the following cannot [#permalink]
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.
Re: If x and y are prime numbers, then which one of the following cannot [#permalink]
Moderator:
Math Expert
94342 posts