NTSE Stage-2 official answer key........

https://www.scribd.com/doc/313975186/Official-Answer-Key-of-NTSE-Stage-2

IESO Last 6 years papers & answer keys.........

2010 (Paper with Answer Key) :
https://www.scribd.com/doc/313651948/IESO-2010-Paper-answer-key

2011 (Paper with Answer Key) :
https://www.scribd.com/doc/313652221/IESO-2011-Paper-Solution

2012 (Paper) : https://www.scribd.com/doc/313652290/IESO-2012-Paper
2012 (Answer Key) : https://www.scribd.com/doc/313652245/IESO-2012-Answer-Key

2013 (Paper) : https://www.scribd.com/doc/313652894/IESO-2013-Paper
2013 (Answer Key) : https://www.scribd.com/doc/313652890/ieso-2013-answer-key

2014 (Paper) : https://www.scribd.com/doc/313652902/IESO-2014-Paper
2014 (Answer Key) : https://www.scribd.com/doc/313652875/Ieso-2014-Answer-Key

2015 (Paper) : https://www.scribd.com/doc/313652888/IESO-2015-Paper
2015 (Answer Key) : https://www.scribd.com/doc/313652913/IESO-2015-Answer-Key

KVPY SA-Stream paper and solutions...

2007-08 (Paper) : https://www.scribd.com/doc/313534124/KVPY-SA-Stream-paper-2007

2007-08 (Solution) : https://www.scribd.com/doc/313534133/Kvpy-Sa-Stream-2007

2008-09 (Paper) : https://www.scribd.com/doc/313534267/Kvpy-Sa-Stream-paper-2008

2008-09 (Solution) : https://www.scribd.com/doc/313534282/KVPY-SA-Stream-Solution-2008

2009-2010 (Paper) : https://www.scribd.com/doc/313534346/KVPY-SA-Stream-Paper-2009

2009-2010 (Solution) : https://www.scribd.com/doc/313534349/KVPY-SA-Stream-Solution-2009

2010-2011 (Paper) : https://www.scribd.com/doc/313534416/KVPY-SA-Stream-Paper-2010

2010-2011 (Solution) : https://www.scribd.com/doc/313534426/KVPY-SA-Stream-Solution-2010 

2011-12 (Paper) : https://www.scribd.com/doc/313534513/KVPY-SA-Stream-Paper-2011

2011-12 (Solution) : https://www.scribd.com/doc/313534514/KVPY-SA-Stream-Solution-2011

2012-13 (Paper) : https://www.scribd.com/doc/313534590/KVPY-SA-Stream-Paper-2012

2012-13 (Solution) : https://www.scribd.com/doc/313534607/KVPY-SA-Stream-Solution-2012

2013-14 (Paper) : https://www.scribd.com/doc/313534622/KVPY-SA-Stream-Paper-2013

2013-14 (Solution) : https://www.scribd.com/doc/313534614/KVPY-SA-Stream-Answer-Key-2013 

2014-15 (Paper) : https://www.scribd.com/doc/313534725/KVPY-SA-Stream-Paper-2014

2014-15 (Solution) : https://www.scribd.com/doc/313534740/KVPY-SA-Stream-Solution-2014

2015-16 (Paper) : https://www.scribd.com/doc/313534780/KVPY-SA-Stream-Paper-2015

2015-16 (Solution) : https://www.scribd.com/doc/313535444/KVPY-SA-Stream-Ans-Key-2015

IJSO Stage-1 (NSEJS) Last-8-year papers & solutions (from 2008 to 2015)

2008-09 (Paper) : https://www.scribd.com/doc/313529953/IJSO-Paper-2008-09

2008-09 (Solution) : https://www.scribd.com/doc/313530537/NSEJS-Solution-2008-09

2009-10 (Paper) : https://www.scribd.com/doc/313529946/IJSO-Paper-2009-10

2009-10 (Solution) : https://www.scribd.com/doc/313530528/IJSO-2009-Solution

2010-11 (Paper) : https://www.scribd.com/doc/313529963/IJSO-Paper-2010-11

2010-11 (Solution) : https://www.scribd.com/doc/313530530/NSEJS-2010-Solution

2011-12 (Paper) : https://www.scribd.com/doc/313529949/IJSO-Paper-2011-12

2011-12 (Solution) : https://www.scribd.com/doc/313530529/NSEJS-Solution-2011

2012-13 (Paper) : https://www.scribd.com/doc/313529967/IJSO-Paper-2012-13

2012-13 (Solution) : https://www.scribd.com/doc/313530531/NSEJS-Solution-2012

2013-14 (Paper) : https://www.scribd.com/doc/313529975/IJSO-Paper-2013-14

2013-14 (Solution) : https://www.scribd.com/doc/313530540/NSEJS-Solution-2013

2014-15 (Paper) : https://www.scribd.com/doc/313529966/IJSO-Paper-2014-15

2014-15 (Solution) : https://www.scribd.com/doc/313530536/NSEJS-Solution-2014

2015-16 (Paper) : https://www.scribd.com/doc/313529981/IJSO-Paper-2015-16

2015-16 (Solution) : https://www.scribd.com/doc/313530539/NSEJS-Solution-2015

Rajasthan NTSE Stage-1 Last 4 year papers & solutions (from 2013 to 2016)

Paper :https://www.scribd.com/doc/313529440/NTSE-Stage-I-Rajasthan-2013-2014-2015-2016-Paper

Solutions :https://www.scribd.com/doc/313531110/NTSE-Stage-I-Rajasthan-last-4-Years-Solutions