Update README.md

csehammad · web-flow · commit e32f328cfbcf · 2021-11-25T01:32:29.000+05:00
diff --git a/README.md b/README.md
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 # Coding Challenges 
 ### This repository contains various coding challenges taken on Sites like HackerRank, LeetCode etc. 
 
-## Challenge#1- Perfix Notation 
+## Challenge#1- Prefix Notation 
 #### Write a function that evaluates an expression written in Prefix Notiation and returrns a value 
 
 ##### Problem Statement: 
