Post subject: GMAT Number Theory (Data Sufficiency)
Posted: Wed Aug 19, 2009 6:00 am
Joined: Sun Apr 19, 2009 6:56 pm Posts: 32
Does r have exactly four distinct positive factors?
(1) r is the product of two numbers, each of them prime numbers. (2) r = 57
r could be the product of 2 x 2 because the question doesn't say whether the two prime numbers are distinct or not. When the two numbers are the same r has 3 not 4 factors. (1, 2,4) Therefore the answer must be (B) not (D)
Users browsing this forum: No registered users and 3 guests
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
GMAT(TM) and GMAT CAT (TM) are registered trademarks of the Graduate Management Admission Council(TM). The Graduate Management Admission Council(TM) does not endorse, nor is affiliated in any way with the owner or any content of this site.