Another similar solution:
$ perl -e '
for (0..1000) {
my $n = int(rand(10000));
print $n, "\n" if $n =~ /\d{0,}[05]\z/
}
'
__sample_output__
7495
8120
8340
9540
7370
4455
310
7540
35
7085
7235
5355
9190
6790
1360
820
1900
1945
1630
9895
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