What is the word or phrase?

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?

Spot what is wrong here in below Picture?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What number should come in place of the question mark below?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?