When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

What is next number in the pattern below:

131 517 192 123 ?

You need to arrange three 7 and mathematical symbols to form number 1?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

You need to remove two matchsticks to make the below equation true. Can you do it ?

A father's child, a mother's child, yet no one's son.

Who am I?

What is the next number in this matchsticks series riddle?