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Prep- Numbers

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Source: — Problem Solving |
Junior | Next Rank: 30 Posts
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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.
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by ildude02 » Wed Jul 16, 2008 12:10 pm
Is this the only method to solve this problem?
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Junior | Next Rank: 30 Posts
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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
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