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

If 21x = 79x, what is the value of x?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Which fur should we be getting from the Lion?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

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?

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

What has 88 keys?

Replace the question mark with the correct number.