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

Redeem

Prep- Numbers

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 15
Joined: Thu Jul 03, 2008 5:46 am
Location: Philadelphia

by jslavi01 » Wed Jul 16, 2008 5:47 am
Set the problem up like this:

Integer Square

1 1
2 4
3 9
4 16
5 25
6 36
7 49
8 64

And you need to get to 75. Once you set the problem up, it shouldn't take more than 30 secs to solve.
Top
Master | Next Rank: 500 Posts
Posts: 320
Joined: Sun Jan 13, 2008 10:00 pm
Thanked: 10 times

by ildude02 » Wed Jul 16, 2008 12:10 pm
Is this the only method to solve this problem?
Top
Junior | Next Rank: 30 Posts
Posts: 15
Joined: Thu Jul 03, 2008 5:46 am
Location: Philadelphia

by jslavi01 » Wed Jul 16, 2008 12:19 pm
ildude02 wrote:Is this the only method to solve this problem?
I'm guessing so. You have 3 unknowns, and the equation would go

x sqrt + y sqrt + z sqrt = 75

Also, you know for sure the highest number is 8.

They way I got it was:
factor 75 first to get (25 * 3),

That gives 5 as one number.

Then look for two numbers that added to 50...49 and 1, or 7 and 1
Top
Post new topic Post Reply
• Page 1 of 1