Solution:(Left) 202, 323, 266, 182, 315, 285, 193, 217, 231, 186( Right When numbers are arranged in descending order,
323, 315, 285, 266, 231, 217, 202, 193, 186, 182,
Number which is fifth from the right = 217
Number which is forth from the left = 266
Required difference = 266 - 217= 49