(a) (–100) ÷ 5
(b) (–81) ÷ 9
(c) (–75) ÷ 5
(d) (–32) ÷ 9
(–100) ÷ 5
(–81) ÷ 9
(–75) ÷ 5
(–32) ÷ 9
(a)=–20, (b)=–9, (c)=–15 are integers. (d)=–32/9 is not an integer. So (d) is odd.