奇数:1,7,9,15,19,39,41,51
偶数:4,8,12,18,20,24,30,
质数:7,19,41
合数:4,8,12,18,20,24,30,15,39,51.
要采纳最先回答的正确答案,是对答题者劳动的尊重.祝进步!