What does this Rebus Picture means ?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you find the 09 errors in the picture below?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What is the riddle which can be asked all day with a different correct answer each time.

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

Why is a river so rich ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.