Sikaku or Rectangles Puzzle

Rectangles puzzle is also known as Sikaku puzzle. It is very good puzzle type in which difficulty level varies from very easy to very tough one. This puzzle as appeared in many of the World Puzzle Championship. Now a days it has become a Classic puzzle type. Answer of this puzzle is given at the end of this post.

Rules of Sikaku puzzle

Divide the given grid into rectangles with the numbers in the cells. Each rectangle is to contain exactly one number showing the number of cells in the rectangle.