2 files changed, 48 insertions, 0 deletions
diff --git a/challenge-140/wambash/ch-1.raku b/challenge-140/wambash/ch-1.raku
new file mode 100644
index 0000000000..8b6206a267
--- /dev/null
+++ b/challenge-140/wambash/ch-1.raku
@@ -0,0 +1,20 @@
+#!/usr/bin/env raku
+
+sub add-binary (+@a) {
+    @a
+    andthen .map: { :2( ~$_ ) }\
+    andthen .sum
+    andthen .base(2)
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is add-binary( 11,  1), 100;
+    is add-binary(101,  1), 110;
+    is add-binary( 11,100), 111;
+    done-testing;
+}
+
+multi MAIN (*@a) {
+    say add-binary @a
+}
diff --git a/challenge-140/wambash/ch-2.raku b/challenge-140/wambash/ch-2.raku
new file mode 100644
index 0000000000..37dde664c6
--- /dev/null
+++ b/challenge-140/wambash/ch-2.raku
@@ -0,0 +1,28 @@
+#!/usr/bin/env raku
+
+constant @multiplication-table = (
+    (1, 2 ... *) Z, (2,4 ... *)
+    andthen .map: { |$_... * }\
+    andthen *.map: *.cache
+);
+
+sub multiplication-table ($k, $i=$k div 2+1, $j=$i) {
+    @multiplication-table
+    andthen .map: *.head($j)
+    andthen .head($i)
+    andthen .flat.sort
+    andthen .[$k-1]
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is multiplication-table(4),3;
+    is multiplication-table(4,2,3),3;
+    is multiplication-table(6,3,3),4;
+    is multiplication-table(150),39;
+    done-testing;
+}
+
+multi MAIN ($k, $i=$k div 2 + 1, $j=$i) {
+    say multiplication-table $k, $i, $j
+}