I have no bed to sleep nor do I have a palace to live.

I don’t have a single penny with me,

But still I am known as king.

Who am I?

What single-digit number replaces the "?" below to go in the middle of the following set of numbers?

1, 8, 10, ?, 8, 3, 11

The sum of 3 single digit numbers is 15 less than their product . If we subtract 2 from first given number then sum of these numbers will become 7 more than their product. Then what will be the product of given 3 numbers?