How is the moon similar to a dollar?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

What has one letter and starts with an E?

What two things can you never eat for breakfast?

Can you solve the photo plexer logic ?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

I cannot talk, but I always reply when spoken to. What am I?

What is always in front of you but can’t be seen?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.