Explanation: The 5 largest 3 -digit numbers are \(999, 998, 997, 996\) and 995 . The 5 smallest 3 -digit numbers are \(100, 101, 102, 103\) and 104. The difference between each corresponding terms in the two sequences is 895 . So, the difference between the sum of the two series = \(5\times895 = 4475\).