Solution

163436

First name
Tia
School
Fredrick Irwin 1/5
Country
Age
0

1/5 = 20% [ 100% + 20% ] ➗ 2 = 60%
5/5 = 100%
1 more 100% = [ 100i% + 100%+ 20% ] ➗ 3 = 70% estimate
2 more 100% = [ 100% + 100% + 100% + 20% ] ➗ 4 =80%
3 more 100% = [ 100% = 100% + 100% + 100% + 20% ] ➗ 5 =84%

Answer = 3 more tests