What Adam and Eve do not have but the rest of the people have?

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

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

Imagine you are in a room with no windows or doors. How will you get out?

I can write cow in 13 letters.

Can You?

You can see it everyday, But cannot touch it at will. What is it?

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?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I am white when I am dirty, and black when I am clean. What am I?