Update README.md

Author: Navtajh04

README.md

@@ -1,6 +1,6 @@
 # C Programming Challenge - Level 1
 
-This mini-challenge is intended to test your knowledge of C programming. There are 11 C programming questions that can be found in the challenge.c file. Your solution to this challenge will be verified automatically on a standard Linux machine once you make a pull request.
+This mini-challenge is intended to test your knowledge of C programming. There are 13 C programming questions that can be found in the challenge.c file. Your solution to this challenge will be verified automatically on a standard Linux machine once you make a pull request.
 
 If you'd like to test your solution locally, make sure you have Make and GCC for your system installed.