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

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I don't get anymore wetter, no matter how much rain falls on me.

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

I know a nine-letter word having only one vowel.
Do you ?

Before Mount Everest was discovered, what was the highest mountain in the world?

I make two people out of one. What am I?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?