Find the hidden tiger in the given optical illusion ?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

You need to move three matchsticks to form three squares. Can you do it?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Prove that the below maths equation is true.

8 + 8 = 91

I add 5 to 9 and get 2. The answer is correct, so what am I?

It belongs to you, but other people use it more than you do. What is it?

I have eight fingers and two thumbs but I do not live. What Am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?