In the future please preview your posts, and read Writeup Formatting Tips

One of the main things enforced by strict is that you need to declare your variables, typically with my.

Here is the code you provided, in the <code> tags: 

#use strict;
#use warnings;

open (FILE, 'german.txt');
@words = <FILE>;
$num = int rand(@words);
($article, $noun) = split(/ /, $words[$num]);
chomp($noun);
print "Who is the article of $noun:";
chomp($resp = <>);
if ($resp eq $article) {
    print "Correct!";
} else {
    print "The correct answer is $article!"
}

[download]
A few problems:
  1. You need to declare the variables with my
  2. You should check that the file was opened successfully
Here is a corrected version 
use strict;
use warnings;

open (FILE, 'german.txt') or die "Failed to open german.txt - $!";
my @words = <FILE>;
my $num = int rand(@words);
my ($article, $noun) = split(/ /, $words[$num]);
chomp($noun);
chomp($article);
print "Who is the article of $noun:";
my $resp = <>;
chomp $resp;
if ($resp eq $article) {
    print "Correct!";
} else {
    print "The correct answer is $article!"
}

[download]

In reply to Re^2: german nouns gender by imp
in thread german nouns gender by vik

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.