What has a ring but no finger?

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?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Why is it very easy to weigh a fish?

What is the next number in this matchsticks series riddle?

Can you solve the rebus below?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Why is the Hole below a Lock?

I don't get anymore wetter, no matter how much rain falls on me.