Can you write down eight eights so that they add up to one thousand?

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 jumps when it walks and sits when it stands?

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

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

How many times can you subtract the number two from the number fifty?

What is the Surname of Barbie Doll?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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?