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diff --git a/challenge-283/0rir/raku/ch-1.raku b/challenge-283/0rir/raku/ch-1.raku
new file mode 100644
index 0000000000..741fdf5a76
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+++ b/challenge-283/0rir/raku/ch-1.raku
@@ -0,0 +1,62 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
+use v6.d;
+use Test;
+
+=begin comment
+
+283-1: Unique Number            Submitted by: Mohammad Sajid Anwar
+
+You are given an array of integers, @ints, where every element appears
+more than once except one element.
+
+Write a script to find the one element that appears exactly one time.
+
+Example 1
+Input: @ints = (3, 3, 1)
+Output: 1
+Example 2
+Input: @ints = (3, 2, 4, 2, 4)
+Output: 3
+Example 3
+Input: @ints = (1)
+Output: 1
+Example 4
+Input: @ints = (4, 3, 1, 1, 1, 4)
+Output: 3
+=end comment
+
+my @Test =
+        # in                exp
+     (3, 3, 1),             1,
+     (3, 2, 4, 2, 4),       3,
+     (1,),                  1,
+     [4, 3, 1, 1, 1, 4],    3,
+;
+
+my @Dead =  (),     [,],       [2,2], ;
+
+plan @Test + @Dead;
+
+sub task( List $a) { $a.Bag.first( { .value == 1 }).key; }
+
+sub task-w-validate( List $a) {
+    my $l = $a.Bag.List;                        # stabilize sequencing
+    my @k = $l.grep( *.value == 1, :k  );
+    die 'Invalid input.' if @k ~~ Empty or @k > 1;
+    $l[@k[0]].key;
+}
+
+for @Test -> $in, $exp {
+    is task($in), $exp, "$exp <- $in.raku()";
+    is task-w-validate($in), $exp, "$exp <- $in.raku() valid";
+}
+for @Dead -> $dead {
+    dies-ok { task-w-validate($dead)}, " dead <- $dead.raku()";
+}
+
+done-testing;
+
+my @int = (1,2,3,4,5,6,7,8,9,10,11,12,12,11,10,9,8,7,6,5,4,3,2);
+say "\nInput: \@ints = @int[]\nOutput: ", task( @int);
+
diff --git a/challenge-283/0rir/raku/ch-2.raku b/challenge-283/0rir/raku/ch-2.raku
new file mode 100644
index 0000000000..a1fc3e0926
--- /dev/null
+++ b/challenge-283/0rir/raku/ch-2.raku
@@ -0,0 +1,65 @@
+#!/usr/bin/env raku
+# :vim ft=raku sw=4 expandtab  # 🦋 ∅∪∩∋∈∉⊆ ≡ ≢ «␤ » ∴
+use v6.d;
+use Test;
+
+=begin comment
+283-2: Digit Count Value            Submitted by: Mohammad Sajid Anwar
+You are given an array of positive integers, @ints.
+
+Write a script to return true if for every index i in the range
+0 <= i < size of array, the digit i occurs exactly the $ints[$i] times
+in the given array otherwise return false.
+
+Example 1
+Input: @ints = (1, 2, 1, 0)
+Ouput: true
+
+$ints[0] = 1, the digit 0 occurs exactly 1 time.
+$ints[1] = 2, the digit 1 occurs exactly 2 times.
+$ints[2] = 1, the digit 2 occurs exactly 1 time.
+$ints[3] = 0, the digit 3 occurs 0 time.
+Example 2
+Input: @ints = (0, 3, 0)
+Ouput: false
+
+=end comment
+
+my @Test =
+    (1).comb.List,                  False,
+    (0).comb.List,                  False,
+    (10).comb.List,                 False,
+    (212).comb.List,                False,
+    (030).comb.List,                False,
+    (3000).comb.List,               False,
+    (40000).comb.List,              False,
+    (31000).comb.List,              False,
+    (3312000).comb.List,            False,
+    (4301000).comb.List,            False,
+    (9122000001).comb.List,         False,
+    (1210.comb.List),               True,
+    (2020.comb.List),               True,
+    (21200.comb.List),              True,
+    (3211000.comb.List),            True,
+    (521001000.comb.List),          True,
+    (6210001000.comb.List),         True,
+    (72100001000.comb.List),        True,
+    (821000001000.comb.List),       True,
+    (9210000001000.comb.List),      True,
+;
+plan @Test ÷ 2;
+
+sub task( $a) {
+    for ^$a -> \i {
+        return False unless  $a.grep( i ) == $a[ i];
+    }
+    True;
+}
+
+for @Test -> $in, $exp {
+    is task($in), $exp, "$exp <- $in";
+}
+done-testing;
+
+my @int = (4, 1, 0, 0, 0, 0);
+say "\nInput: @ints = @int.raku()\nOuput: { task @int }";