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diff --git a/challenge-180/0rir/raku/ch-1.raku b/challenge-180/0rir/raku/ch-1.raku
new file mode 100644
index 0000000000..19d1a03046
--- /dev/null
+++ b/challenge-180/0rir/raku/ch-1.raku
@@ -0,0 +1,50 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # ∅ ≡ ∩ ≢
+use v6.d;
+use Test;
+constant TEST=False;
+
+=begin comment
+Task 1: First Unique Character      Submitted by: Mohammad S Anwar
+
+Given a string, $s, find the first unique character in the
+string and print its index (0-based).
+
+Examples:
+Input: $s = "Perl Weekly Challenge"
+Output: 0 as 'P' is the first unique character
+
+Input: $s = "Long Live Perl"
+Output: 1 as 'o' is the first unique character
+=end comment
+
+sub first-unique-char ( Str $s is copy, Bool :$i --> Int ) {
+    $s = $s.fc if $i;
+    my $b = Bag.new:   my @c = $s.comb();
+    @c.first( { $b{$_} === 1}, :k );
+}
+
+if TEST {
+    my @Test = 
+        { in => 'abcdeA',        exp => 0, iexp =>  1 },
+        { in => 'abcdeabcD',     exp => 3, iexp =>  4 },
+        { in => 'abcddefabcEfg', exp => 5, iexp => 12 },
+    ;
+
+    plan 2 × @Test.elems;
+    for @Test -> %t {
+        is first-unique-char(%t<in>),      %t<exp>, "%t<in>";
+        is first-unique-char(%t<in>, :i ), %t<iexp>, "%t<in> :i";
+    }
+    done-testing;
+    exit;
+}
+
+sub MAIN( Str $s = 'Raku Yearly Challenge' ) {
+    my $k = first-unique-char($s);
+    say qq{Input: \$s = "$s"\n},
+        qq{Output: $k as '$s.substr($k, 1)' is the first unique character};
+    $k = first-unique-char($s, :i );
+    say qq{Or    : $k as '$s.substr($k, 1)' is 1st if case is ignored.};
+}
+
diff --git a/challenge-180/0rir/raku/ch-2.raku b/challenge-180/0rir/raku/ch-2.raku
new file mode 100644
index 0000000000..acaffda37b
--- /dev/null
+++ b/challenge-180/0rir/raku/ch-2.raku
@@ -0,0 +1,46 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # ∅ ≡ ∩ ≢
+use v6.d;
+use Test;
+
+constant TEST=False;
+
+=begin comment
+Task 2: Trim List       Submitted by: Mohammad S Anwar
+Given a list of numbers, @n and an integer $i, trim the list where
+element is less than or equal to the given integer.
+
+NOTE: The 1st example conflicts with the specification given; the second
+doesn't clarify.  Precedence is given to the specs.
+
+Example 1
+Input: @n = (1,4,2,3,5) and $i = 3
+Output: (4,3,5)
+Example 2
+Input: @n = (9,0,6,2,3,8,5) and $i = 4
+Output: (9,6,8,5)
+=end comment
+
+sub gt-grep( Int $limit, List $bucket) {
+    $bucket.grep: { $_ > $limit};
+}
+
+if TEST {
+    my @Test =
+    { in => ( 5,  ( 5,)) , exp => () },
+    { in => ( 3,  (1, 4, 2, 3, 5)), exp => ( 4, 5) },
+    { in => ( 4,  (9, 0, 6, 2, 3, 8, 5)) , exp => ( 9, 6, 8, 5) }, ;
+
+    plan @Test.elems;
+    for @Test -> %t {
+        is gt-grep( %t<in>[0], %t<in>[1]), %t<exp>, "%t<in>";
+    }
+    done-testing;
+    exit;
+}
+
+sub MAIN( $i = 5, @n = (1,9,0,6,2,3,8,5,104,) ) {
+    say 'Input: @n = (', @n.join(','), ') and $i = ',$i ;
+    say 'Output: (', gt-grep( $i, @n).join(','), ')';
+}
+