Solution

36386

First name
geoffrey
School
greenacre public school
Country
Age
10

1 and 7

the 1st from the left is 2 and 5, the second is 1 and 7 (answer), the 3rd from the left is 4 and 9, the 2nd from the right is 6 and 8 and the 1st from the right is 0 and 3.

how i did it was easy. i wrote the possibilities for each envelope and started by choosing one from the last from the right. I just eliminated until i found the answer. or i just did guess and check