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December 28th, 2016, 04:27 PM   #1
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Matrix problem

I have a matrix that needs solving to open a Christmas present. Does anyone know how .

I have not used that math for forty years and by coincidence I threw that text away only two months ago.

Here is a link to the problem. Only one of the three is actually needed to open this box puzzle thing. This is part of an ongoing game that we have played for a number of years. This box might hold another bottle of 18 yr old Bowmore Islay single malt and I could "share"

https://drive.google.com/drive/folde...mc?usp=sharing

Any help would be greatly appreciated
Thanks Norm
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December 28th, 2016, 07:01 PM   #2
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You need, for example, to combine A and b together to form an augmented matrix, then apply Gaussian elimination and find the column vectors.

The present-giver apparently expects you to use the inverse matrix method for these, though it's a bit cumbersome to do that with these matrices, since there's no shortcut formula for 4x4
Thanks from Joppy
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December 28th, 2016, 07:49 PM   #3
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My son-in-law was going to be even tougher but it has been 10 years since his masters so he thought he would be " kind". It has been 40 years for me.
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December 28th, 2016, 08:01 PM   #4
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December 29th, 2016, 07:39 AM   #5
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Whoop hoo
Worked like a charm.
Thanks very much
Norm
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December 30th, 2016, 12:37 PM   #6
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Originally Posted by Nheagle View Post
Whoop hoo
Worked like a charm.
Thanks very much
Norm
my fee, oddly enough, comes to 3oz of 18 yr old Bowmore Islay single malt
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December 31st, 2016, 10:24 PM   #7
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And I, kind sir, would be happy to pour you a wee dram. However there was but a lone bottle of beer....Innis & Butt...or something.
If your ever out Victoria BC way then stop by for a cold one or eleven!

Thanks again
Norm

Would you care to see the box that was opened?

Last edited by Nheagle; December 31st, 2016 at 10:32 PM.
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December 31st, 2016, 11:46 PM   #8
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Would you care to see the box that was opened?
Why not
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January 1st, 2017, 08:35 AM   #9
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A few pics of box added
https://drive.google.com/drive/folde...2tZZ2szOUtIdmc

Last edited by skipjack; January 2nd, 2017 at 07:36 PM.
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January 2nd, 2017, 03:43 AM   #10
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Quote:
Originally Posted by Nheagle View Post
I have a matrix that needs solving to open a Christmas present. Does anyone know how .

I have not used that math for forty years and by coincidence I threw that text away only two months ago.

Here is a link to the problem. Only one of the three is actually needed to open this box puzzle thing. This is part of an ongoing game that we have played for a number of years. This box might hold another bottle of 18 yr old Bowmore Islay single malt and I could "share"

https://drive.google.com/drive/folde...mc?usp=sharing

Any help would be greatly appreciated
Thanks Norm
If you copy or download these papers, you'll have better access to them and thus practice more efficiently.
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