Which Burger Is Different in below image?

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

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?

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

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

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?

What breaks yet never falls, and what falls yet never breaks?

What is the Surname of Barbie Doll?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?