Hiii.

If you didnot Join any coching classes & You have to prepare For exam By your Own Then Arihant Books are Very Good for MAT..I am suggesting you some other books also Which you have to refer at once for Variety of examples.

MAT (Management Aptitude Test) Entrance Exams with Practice CDby GKP (G K Publications Pvt. .

The Pearson MAT Super Course with CD (Pearson)

Study Package For Management Aptitude Testby Arun Sharma (Tata McGraw-Hill).

Also You can Find lots of free material On Internet also..There are soo many sites which provide free aptitude Knowledge..Go through it also..It will help you to make familier With Lots of varieties.