Hello All, I am having 1000 consecutive numbers always starting with 1, and there could be upto 24 missing numbers from the list. My question is, what pieces of information should I have in order to find out those missing numbers. So far I came up with, 1. Sum of missing numbers. 2. Number of numbers missing from the list. I know that the above information is not enough. lets say sum of missing numbers is 9 and numbers missing are two, it can be 3 and 6 or 5 and 4. I can Have multiplication of missing numbers(?) but that might turn into a huge number. Please help with this solution. I am building a computer program that finds out missing numbers with as less information as possible. Thanks, Ganesh.