If you say my name, I will no longer exist. What am I?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

What type of tree can I carry in my hand?

Can you find out the number of the parking space in which the car is parked?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

What is harder to catch the faster you run?