I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What does this mathematical rebus means ?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

I am sure no one can have two things for dinner. what are they?

Count the Triangle in the figure given below:

By using 'because' continuously three times, can you make an English statement ?

What has a bottom at the top?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?