Hello,

You can download NTSE Karnataka 2018 question paper from the link below

https://school.careers360.com/articles/ntse-karnataka-question-papers

You will get the important details regarding the exam and also, you can download 2019 and 2020 papers from this link.

Also, you can access the answer keys from the official site of Department of State Educational Research and Training. From the NTSE/NMMS section at the Menu you can get access of these.

Hope it helps!

Good luck!