3, 4, 5, 6, 7 ......... 100 (1)
1, 2, 3, 4, 5,...........98 (2)
筛掉数列(1)中3的倍数, 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99.(3)
就带走数列 (2)中的1,4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,64,67,70,73,76,79,82,85,88,91,94,97.(4)
数列(3)5的倍数含量33/5,数列(4)中的5的倍数含量也是33/5,
筛去数列1的倍数含量,暗中带走了数列2中5的倍数含量,
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