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

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

The more you take me, the more you leave me behind.
Who Am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

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

Can you solve this picture maths equation?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

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?