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

Redeem

You will Love This

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 392
Joined: Thu Jan 15, 2009 12:52 pm
Location: New Jersey
Thanked: 76 times

by truplayer256 » Mon May 11, 2009 5:34 pm
a+1/(cb+1/c)=16/5
a+c/cb+1=16/5
acb+a+c/cb+1=16/5

acb+a+c=16
cb+1=5
cb=4

5a+c=16
a=3
c=1
b=4

3+1+4=8 B.
Top
Master | Next Rank: 500 Posts
Posts: 392
Joined: Thu Jan 15, 2009 12:52 pm
Location: New Jersey
Thanked: 76 times

by truplayer256 » Wed May 13, 2009 6:30 am
What's the OA?
Top
Master | Next Rank: 500 Posts
Posts: 487
Joined: Fri Mar 27, 2009 5:49 am
Thanked: 36 times

by dtweah » Wed May 13, 2009 6:50 am
truplayer256 wrote:What's the OA?
You nailed the Truplayer but the OA thinks you could have saved some time. It wants you to decompose a fraction instead of composing it.

(b) Since 1/(b + 1/c) < 1 then a = 3 and (b + 1/c) = 5. Since 1/c <= 1 then b = 4 and c = 1.

---------------

So in other words what they are saying
16/5=3 + 1/5= 3 +1/(1+4/1).

We got to be thinking something like this when you are given only one equation with 3 unknowns, just to save time and avoid errors.
Top
Post new topic Post Reply
• Page 1 of 1