Hi,
I am providing you the link of 5 eBooks which is must have for GMAT/
CAT aspirants.
http://secure.plimus.com/jsp/dev_store1.jsp?developerId=1002206
These e-books have been developed under guidance of
Mr. Pradeep Kumar [B. Tech, MBA (IIM Bangalore); Founder Director of
Magical Methods Training Pvt. Ltd.]
the foremost authority on utilisation of Vedic Mathematics for
Intelligent Guessing in India and the world.
Using this technique you would be able to solve problems in your mind.