Problem
First name
Sophia Fabian
School
Lowry
Country
Age
7
Start with envelope 3: 1+2 or 3+0
envelope 14: 9+5 OR 8+6
envelope 13: 9+4 or 8+5 or 7+6
envelope 8: 5+3 or 6+2 or 7+1 or 8+0
envelope 7: 4+3 or 5+2 or 6+1 or 7+0
Trial and error:
envelope 3 = 1+2
envelope 14 = 9+5
envelope 13= 7+6 (can't use 9 or 5)
envelope 7 = 4+3 (can't use 5 or 6 or 7)
envelope 8 = 8+0