What word would you use to describe a man who does not have all his fingers on one hand?

What never asks a question but gets answered all the time?

What starts with “e” and ends with “e” but only has one letter in it?

You spot a boat full of people but there isn’t a single person on board. How is that possible?

How do you make the number one disappear?

(pls answer correctly, it will help you to sharpen your mind)​