What has many keys but can’t open a single lock?

Which word does the below Plexor means ?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Why is the Hole below a Lock?

Which letter of the alphabet has the most water?

Who is that with a neck and no head, two arms and no hands? What is it?

Why 1729 is a magic number? Answer Logically.

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Can you fill the blank with the correct number?

6 30 870 756030 _____

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?