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

What does the below rebus riddle means?

What's a single-digit number with no value?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

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?

Which letter of the alphabet has the most water?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Who has married many women but was never married?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?