Why is the longest human nose just 11 inches?

Can you replace the question mark with the correct number in the below table sequence?

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?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Buy me, smell me or deliver me, I do not change.

Who am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?