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

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

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.

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

John was piloting a plane behind a car but was never able to overtake it. Why?

How many times can you subtract the number two from the number fifty?

What is more useful when it is broken?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?