Please help explain

This topic has expert replies
Junior | Next Rank: 30 Posts
Posts: 19
Joined: Mon Mar 21, 2011 2:57 pm

Please help explain

by tvtt2010 » Thu Aug 18, 2011 12:22 pm
1. Are x and y both positive?
1. 2x-2y=1
2.x/y>1

2. IF p is a prime number greater than 2, what is value of p?
1. there are total 100 prime number between 1 and p+1
2. there are total p prime number between 1 and 3912

Thanks
Source: — Data Sufficiency |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Fri Aug 19, 2011 3:34 am
tvtt2010 wrote:1. Are x and y both positive?
1. 2x-2y=1
2.x/y>1
Refer to the following detailed posts by Rahul,
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Fri Aug 19, 2011 3:36 am
tvtt2010 wrote:2. IF p is a prime number greater than 2, what is value of p?
1. there are total 100 prime number between 1 and p+1
2. there are total p prime number between 1 and 3912
Refer to the post here : https://www.beatthegmat.com/prime-nos-t88967.html#395356
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/

Legendary Member
Posts: 2789
Joined: Tue Jul 26, 2011 12:19 am
Location: Chennai, India
Thanked: 206 times
Followed by:43 members
GMAT Score:640

by GmatKiss » Fri Aug 19, 2011 9:06 am
tvtt2010 wrote: 2. IF p is a prime number greater than 2, what is value of p?
1. there are total 100 prime number between 1 and p+1
2. there are total p prime number between 1 and 3912

Thanks
IMO:D

1) The range is 1 - (100 prime numbers) - 1+P
2) The range is from 1 - 3912

Remember, both the choices are sufficient to determine the value of P, but it will be time consuming!
we need to know only if the choices are sufficient!! and they are!