Can you find the missing piece of the Porsche?

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

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

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Why 1729 is a magic number? Answer Logically.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

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?