If eleven plus two equals one, what does nine plus five equal?

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 ?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Can you count the number of triangles in the given figure?

What does does this rebus picture means ?

Replace the question mark with the correct number in below Picture:

Imagine you are in a room with no windows or doors. How will you get out?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What has a ring but no finger?