How is the moon similar to a dollar?

Find the number of squares in the below picture

In The Image Below Which clock is the odd one out?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

What always comes into a house through the keyhole?

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

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?