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

Can you find the missing piece of the Porsche?

What is the Surname of Barbie Doll?

How many sides does a circle have?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

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

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?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

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

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?