Most Preferred Books for JAM and GATE

1)  Calculus And Analytic Geometry by Thomas and Finney (other authors can also be preferred)
2)  Integral Calculus by Maiti  and Ghosh , helps a lot to understand RealAnalysis too.
3)  Advanced Calculus by Angus E Taylor
4)   Books from NCERT
5) Books authored by Dr.Shanti Narayan
                                     get required GATE text books from here.

Mirrors for the previous papers of mathematics and statistics for IIT JAM from 2005 to 2016

2005 mathematics statistics

2006 mathematics statisticss

2007 mathematics statistics

2008 mathematics statistics

2009 mathematics statistics

2010 mathematics statistics
2011 mathematics statistics 
2012 mathematics statistics 
2013 mathematics statistics
2014 mathematics statistics
2015 mathematics statistics
2016 mathematics statistics

JAM IIT Mathematics and Mathematical Statistics previous question papers.

:)

IIT Jam Previous papers available at the following sites

http://jam.iitkgp.ac.in/download.htm

http://jam.iitm.ac.in/prevqns.php