Always in you, Sometimes on you;

If I surround you, I can kill you.

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 Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

Why 1729 is a magic number? Answer Logically.

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

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

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

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What demands an answer, but asks no questions

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