Add tasks for all the new languages

Task/Least-common-multiple/8th/least-common-multiple.8th

@@ -0,0 +1,25 @@
+: gcd \ a b -- gcd
+	dup 0 n:= if drop ;; then
+	tuck \ b a b
+	n:mod \ b a-mod-b
+	recurse ; 	
+
+: lcm \ m n
+	2dup \ m n m n
+	n:* \ m n m*n
+	n:abs \ m n abs(m*n)
+	-rot \ abs(m*n) m n
+	gcd \ abs(m*n) gcd(m.n)
+	n:/mod \ abs / gcd
+	nip \ abs div gcd
+;
+
+: demo \ n m --
+	2dup "LCM of " . . " and " . . " = " . lcm . ;	
+
+12 18 demo cr
+-6 14 demo cr
+35  0 demo cr
+
+
+bye