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I'm looking for challenging problems in elementary linear algebra, i.e. mainly about matrices in the field of real numbers. Can anyone provide some references?

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    Welcome to math.stackexchange! Anytime you need elementary but challenging problems, check out the [Art of Problem Solving](http://www.artofproblemsolving.com/Forum/viewforum.php?f=346).2011-11-06
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    Linear algebra is not that elementary, I don't think they discuss it extensively there.2011-11-06
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    Could you describe more precisely what you are after then? These problems see relatively challenging to me, though you may find them easy: [1](http://www.artofproblemsolving.com/Forum/viewtopic.php?f=349&t=421324) [2](http://www.artofproblemsolving.com/Forum/viewtopic.php?f=349&t=419577) [3](http://www.artofproblemsolving.com/Forum/viewtopic.php?f=349&t=443600) [4](http://www.artofproblemsolving.com/Forum/viewtopic.php?f=349&t=432640).2011-11-06

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