BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

GMAT PROBLEM??

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 446
Joined: Thu Jul 26, 2007 1:07 pm
Thanked: 6 times

GMAT PROBLEM??

by dferm » Mon Apr 21, 2008 12:04 pm
If x,y, and z are integers greater than 1, what is the value of x+y+z?

(1) xyz = 70
(2) x/yz = 7/10


Please explain...
Top
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 423
Joined: Thu Dec 27, 2007 1:29 am
Location: Hyderabad, India
Thanked: 36 times
Followed by:2 members
GMAT Score:770

by simplyjat » Tue Apr 22, 2008 12:51 am
1) SUFFICIENT xyz = 70 => x*y*z = 2*5*7 As there are only three prime factors of seventy. You know that 2+5+7 = 14

2) INSUFFICIENT x/yz = 7/10 => here we get similar information, x/yz = 7 / 2*5. but this does not lead to unique values of x y z; x = 7,14,21... y = 2, 4, 6... z = 5, 10,15...
simplyjat
Top
Post new topic Post Reply
• Page 1 of 1