In basic math it's called a story problem. you should have been past simple maths by your freshman year of H.S. if not this is the last one you'll need.
THE ANSWER IS A THREE(3) DIGIT NUMBER
You are at a wall by yourself. On the wall are three numbers
IN CORRECT ORDER: 1 5 3
The answer to the code [three #'s] lies in three clues:
1. Three brothers were born, one after another. From the richest to the
poorest. (the zenith was the origin)
2. The second is equal to the sum of the other two.
3. The last is equal to the number of brothers.
Post, Message, IM, or e-mail me with the answer.