What is the residue modulo 16 of the sum of the modulo 16 inverses of the first 4 positive odd integers? Express your answer as an integer from 0 to 15, inclusive.
If I understand your question:
"The sum of modulo 16 inverses of the first 4 positive odd integers" is:[1, 3, 5, 7]^ -1 mod 16 =[1 + 11 + 13 + 7] ==32
32 mod 16==0