Find all School-related info fast with the new School-Specific MBA Forum

It is currently 27 Aug 2014, 17:06

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If s@t= 1/s + 1/t where both s and t are prime numbers, s@t

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 09 Sep 2004
Posts: 166
Followers: 1

Kudos [?]: 1 [0], given: 0

If s@t= 1/s + 1/t where both s and t are prime numbers, s@t [#permalink] New post 01 Nov 2004, 17:03
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
If s@t= 1/s + 1/t where both s and t are prime numbers, s@t = 1?

1. s+t not equal to 4

2. s/t is not equal to 1

Pls explain
GMAT Club Legend
GMAT Club Legend
avatar
Joined: 15 Dec 2003
Posts: 4318
Followers: 20

Kudos [?]: 156 [0], given: 0

GMAT Tests User
 [#permalink] New post 01 Nov 2004, 18:12
D it is
Expression can also be written as [s+t] / st
Only way expression can be = 1 is if both s and t = 2
1) s+t not equal to 4 so therefore, expression cannot be equal to 1. sufficient
2) says that s and t are different primes. Since we need s and t = 2, we know that different primes will NOT yield 1 as final answer. sufficient
_________________

Best Regards,

Paul

  [#permalink] 01 Nov 2004, 18:12
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Is st = t ? sidmaken 4 07 Jun 2014, 12:04
If s@t= (1/s) + (1/t) and s and t are prime numbers, does HVD1975 2 10 Sep 2008, 06:43
Experts publish their posts in the topic If S and T are non-zero numbers and 1/S + 1/T = S + T, which aaron22197 8 06 Aug 2008, 06:39
If S and T are non-zero numbers and 1/t + 1/s = s+t, which sondenso 5 28 May 2008, 19:15
Experts publish their posts in the topic If S and T are non zero numbers, and 1/s + 1/t = s + t, bmwhype2 8 08 Nov 2007, 10:52
Display posts from previous: Sort by

If s@t= 1/s + 1/t where both s and t are prime numbers, s@t

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.