What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Where do fish keep their money?

What have one eye but still cannot see?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

I can write cow in 13 letters.

Can You?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

Can you find the mistake in the below statement?

How is the moon similar to a dollar?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?