Problem
First name
kavi
School
Saint James The Great
Country
Age
8
Since the code has to be three digits,T has to be one of the digits as the code is t16 so you have to use the digits 123456789 to unlock the code and use the letters abcdefghijklmnopqrst so a=1 b=2 c=3 d=4 e=5 f=6 g=7 h=8 I=9 J=1 k=2 L=3 M=4 n=5
o=6 p=7 q=8 r=9 s=1 t=2.
So the code could be 216.
If this failed, the code could be equal to 320 because T is the 20Th letter of the alphabet so T16=20 times 16 =320.