50以内奇数有 质数有 合数有

质数有：【2,3,5,7,11,13,17,19,23,29,31,37,41,43,47 】 合数有：【4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,50 】 奇数有;l [1,3,5,7,9,11,13,15,17,19,...