What has many keys but can’t open a single lock?

Find the missing letter in the last circle logically in the given below picture.

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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 can write cow in 13 letters.

Can You?

Remove two matchsticks to make the below equation correct.

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

10+10 and 11+11 can give you the same answer.

Explain how?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?