Updated code

Author: ImAkshayad

README.md

@@ -47,4 +47,6 @@
     - Arrays
         - [Remove duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/) | [Solution](leetcode/arrays/RemoveDuplicates.py) 
         - [First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/) | [Solution](leetcode/arrays/first-unique-character-in-a-string.py)
-        - [Remove Element](https://leetcode.com/problems/remove-element/) | [Solution](leetcode/arrays/remove-element.py)
+        - [Remove Element](https://leetcode.com/problems/remove-element/) | [Solution](leetcode/arrays/remove-element.py)
+    - Math
+        - [Palindrome Number](https://leetcode.com/problems/palindrome-number/description/) | [Solution](leetcode/math/palindrome.py)