2024-03-07
1到999的单数和双数分别是:单数:1,3,5,7,9,11,13,15,17,19,2l,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99,101,lo3,双数有:2,4,6,8,10,12,|4,16,|8,2O,22,24,26,28,3o,32,34,36,38,4o,42,44,46,48,5O,52,54,56,58,60,62,64,66...