For the students and professionals who are trying to get placed in companies, i am giving you a bunch of helpful tutorials. I think these are the top in Aptitude references. These tutorials will improve your logical and verbal abilities.
- Barrons GRE
- Challenging Logic and Reasoning Problem
- Puzzle to Puzzle You
- R S Aggarwal Quantitative Numerical Aptitude
- R S Aggarwal Verbal Reasoning