What does this Rebus Picture mean?

What has no start, end, or centre?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you Find and name the hidden bird in the picture below ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10