This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What number should come in place of the question mark below?

What number when divided in half becomes zero?

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 ?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

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?

Count the number of triangles in the picture below:

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.