you both reached the correct answer but with another way I did.
I did it like this:
1st step: take the numbers 1 to 9 and square them giving:
01,,04,,09,,16,,25,,36,,49,,64,,81
2nd step: reverse the numbers above giving:
10,,40,,90,,61,,52,,63,,94,,46,,18
3rd step: add the numbers from (1 to 9) to each number in step two respectively:
10+1= 11
40+2= 42
90+3= 93
61+4= 65
52+5= 57
63+6= 69
94+7=101
46+8= 54
18+9= 27
And so ,,,the box number 54 originates from number 8
Thank you all