Name a key which is hardest to turn.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

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 ?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

What can go up a chimney down, but can’t go down a chimney up?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What work can one never finish?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?