hey,

you can watch you tube video of study smart to know about short cut technique which are really help full for any competitive exam. the entrance test for bba is fully aptitude test. si I would suggest you to follow the below books and practice as much as possible taking a notice of time period.

How to prepare for Quantitative by Arun Sharma (TMH Publication)

How to prepare for Data Interpretation by Arun Sharma (TMH Publication) – Only for Basics

The Pearson Guide to Quantitative Aptitude and Data Interpretation by Nishit Sinha

quanti, aptitude and reasong by rs agarwal

Word Power Made Easy – By Norman Lewis

English Grammar and Composition – Wren and Martin

follow hindu and times of india for current affairs.