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@@ -63,7 +63,7 @@ When learning CS there are some useful sites you must know to get always informe
 
 # Interview Preparation
   * [GeeksforGeeks | A computer science portal for geeks](http://www.geeksforgeeks.org/) : also subscribe to their feeds to get links to their new articles.
-  * [A site for technical interview questions, brain teasers, puzzles, quizzles]((http://www.techinterview.org/) whatever the heck those are) and other things that make you think!
+  * [A site for technical interview questions, brain teasers, puzzles, quizzles](http://www.techinterview.org/) whatever the heck those are) and other things that make you think!
   * [Problems | LeetCode OJ ](https://leetcode.com/problemset/algorithms/) : Coding practice for interviews
   * [Programmer And Software Interview Questions Answers](http://www.programmerinterview.com/)
   * [Reddit.com/me/m/puzzles](https://www.reddit.com/me/m/puzzles) : Logic Puzzles
@@ -180,7 +180,7 @@ When learning CS there are some useful sites you must know to get always informe
 # Learn AI 
  * [Unsupervised Sentiment Neuron ](https://blog.openai.com/unsupervised-sentiment-neuron/)
  * [Robots that learn](https://blog.openai.com/robots-that-learn/)
- * [https://grakn.ai/]
+ * [grakn.ai](https://grakn.ai/)
  
 # Seminar , research writing , talks etc
   * [Advice on Research and Writing ](http://www.cs.cmu.edu/~mleone/how-to.html)