update snippets 78 - 96

snippets/lcm.md

@@ -10,5 +10,8 @@ const lcm = (x, y) => {
   const gcd = (x, y) => !y ? x : gcd(y, x % y);
   return Math.abs(x * y) / (gcd(x, y));
 };
-// lcm(12,7) -> 84
+```
+
+```js
+lcm(12,7) -> 84
 ```