按照从1到100的顺序,将数字一一写下:1,2,3,4,5,6,7,8,9,1011,12,13,14,15,16,17,18,19,2021,22,23,24,25,26,27,28,29,3031,32,33,34,35,36,37,38,39,4041,42,43,44,45,46,47,48,49,5051,52,53,54,55,56,57,58,59,6061,62,63,64,65,66,67,68,69,7071,72,73,74,75,76,77,78,79,8081,82,83,84,85,86,87,88,89,9091,92,93,94,95,96,97,98,99,100可以发现,在上述数字中,偶数的个位数字只会是0、2、4、6、8,因此这些数字中的偶数有 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98 和 100。