I have published the ISC Maths Specimen Paper 2012 on my site follow the link to download it.
Solved ISC Maths Paper 2015 Download Link
Solved CBSE Maths Paper 2015 Download Link
JEE Main 2015 Solved Maths Paper Download Link
Solved Problems from entrance exams of B.Math and B.Stat conducted by ISI ( Indian Statistical Institute ) http://kolkatamaths.yolasite.com/problems-for-isi.php