Four Skyscraper Puzzles

In a town there are 16 skyscrapers on a four-by-four grid. In each row or column, the buildings range in height from 1 story to 4 stories.


If you stand outside the grid and look down a row (or column), a skyscraper in that row will be hidden from view if there is a taller one in front of it. In the picture on the left, you could see two skyscrapers if you were standing at one end of the row and and three skyscrapers if you were standing at the other end.

The four pictures above represent four different towns, the numbers outside the grids tell how many skyscrapers you can see when you look in that direction down the row or column.

For each of these four puzzles, you are asked to determine the height (in stories) of each of the skyscrapers. In two of the puzzles, the height of some of the skyscrapers is known.