39659

I have a answer for question 9.
The answer is a is 9, b is 2 and c is 1.
I know this because if you use the first 2 a's as 99 then you can add 22 and you get 121 which could be right. I got this answer by thinking about 2 2-digit numbers that added up to over 100. Then you know all the b's have to be the same so you think of a number. I thought of 2. Then I put the sum down and then I converted it into all the b's as 2 but kept the rest as letters. I wrote out the set-up again and thought of a number that would make 22 into a 3-digit number. Next I added them in I used 99. Finally I added up 99 and 22 and I got 121 so I figured that the c's had to be 1's. That how I figured out my answer.