This is not what you ought to do.
You are just solving some random math puzzle.
No one asked you to solve it.
Think harder.
Are you in the right place?
E-mail what you think the answer might be to devashish.sonowal@niser.ac.in
Give complete details.
Click on the following link to go back:
Take me back home.Or you can ask for a hint (contact invigilator).
However, you lose some points.