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

What has many keys but can’t open a single lock?

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?

Which is the correct shadow of the bird?

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

Can you find the missing piece of the Porsche?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

What is the Surname of Barbie Doll?

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

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