fix(guide): simplify directory structure

guide/english/javascript/standard-objects/math/math-random/index.md

@@ -0,0 +1,23 @@
+---
+title: Math Random
+---
+## Math Random
+
+`Math.random()` returns a number between 0 (inclusive) and 1 (exclusive). 
+
+#### Syntax
+
+`Math.random()`
+
+#### Example
+
+```js
+function randomInRange(min, max) {
+  return Math.random() * (max - min) + min;
+}
+```
+
+#### More Information:
+<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random" target="_blank" rel="nofollow">MDN</a>
+
+