1. Different integers A, B, C, D consist of the same digits. A+B=C. B+C=D. What are the smallest numbers which satisfy this?

2. Can it also be solved if we add C+D=E?

3. What if instead we add A+D=E?

(In reply to solution to part 1. by xdog)

I was beginning to think that we'd be looking beyond 4-digit numbers.

Posted by brianjn on 2013-11-15 00:09:47