36340

In the envelope with number 3 on it could be 0,1,2,3,4,5,6,7,8,9 in my solution it was 0&3. For the envelope number two the total was 8 and the numbers could be anything from 0 to 9 in mine it was 7&1. In envelope number three the total was 7 and the answer could be anything from 0 to 9 in my solution it was 2&5.
Envelope four the total was 13 my answer was 9&4 and on the last envelope the number was 14 and my answer was 8&6. Me and my friends found three solutions one was by Samual and another by Ellie.