What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

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?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

When can we add 2 to 11 and get 1 as the correct answer?

What can jump higher than a building?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?