Solutions
Ch 21, Primitive Rootes and Indices Ch 22, Squares Modulo p
First Edition: 20.1, 20.2(a), 20.5(a,b), 21.1, 21.2, 21.3 Second Edition: 20.2, 20.3(a), 20.6(a,b), 21.1, 21.2, 21.3
Ad libitum (as you wish)