Let's see now. The greatest 3-digit number is 999, because if you add 1 to that you get 1000, which is a 4-digit number. So 999 is the greatest 3-digit number "100 more than" means to add 100 to it. So that's just what we will do. We'll add 100 to 999: 999 +100 1099 So the answer is 1099. It didn't really take a rocket scientist, now did it? Edwin