Solution

Sealed Solution Hayeon

Problem / game
Sealed Solution Back to problem
First name
Hayeon
School
DCSG
Country
Singapore
Age
11

The solution is to jot down all the the possibilities on the sum of each envelope and tweak them so they use all the numbers from 0-9. There are 2 possibilities for envelope number 8 which is 8,0 and 3,5.