When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How many times can you subtract the number 5 from 25?

What is more useful when it is broken?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What is the riddle which can be asked all day with a different correct answer each time.

The dirtier I get, the whiter I look. Who am I?

I am white when I am dirty, and black when I am clean. What am I?