Number puzzle is a traditional slide puzzle with the object being to rearrange the tiles in the correct number sequence either in Ascending or Descending order. The sequence of numbers can be arranged Horizontally or Vertically.
PNB Puzzle is the traditional slide puzzle with object (the numbers) being to rearrange in the correct number sequence. It consists of 15 square numbered from 1 - 15, that are placed in a 4 x 4 box with one empty position.
To get the correct sequence of number squares user need to slide the 15 number one at a time around the board in order to place them in numerical order.