should i use other data structure or algorythm to solve that in python?

thank for feedback.. but if i return then how i can i loop through .
just an example
def trial:
for num in range(11):
return num

then the function will break because of returing everytime...

0 ==> 0
2 ==> 5
3 ==> 5
12 ==> 15
21 ==> 25
30 ==> 30
-2 ==> 0
-5 ==> -5

Input: 1: None should equal 5

this is my kata on codewar...

output is okay ... same to same
why i am still getting this error