Section 1.7: Exercises 4-7, 11 and
A little clarificiation for Exercise 1.7.7.: [2] = [8] are not distinct residue classes modulo 6, because they both consist of numbers 2, 8, 14,... and -4, -10, -16,...
1.7.16: Find an integer x such that x ≡ 3 (mod 4) and x ≡ 5 (mod 9).
Section 1.8: Exercises 5, 6, 8, 10