What is both possible and impossible at the same time?

Take one out and scratch my head, I am now black but once was red. What am I?

Identify The phrase in the picture.

What number when divided in half becomes zero?

Give it food and it will live; give it water and it will die.

What is the Surname of Barbie Doll?

Can you solve the below tricky visual equation?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Why Wine Glass Stem is so long?