从1,3,5,7,9中取两个数,从0,2,4,6,8中取两个数,组成无重复数字的4位数1.共能组成作少个2.能被5整除的有多少_数学解答

从1,3,5,7,9中取两个数,从0,2,4,6,8中取两个数,组成无重复数字的4位数
1.共能组成作少个
2.能被5整除的有多少

人气：163 ℃　时间：2019-10-08 14:45:55

解答

1302.1304.1306.1308.1502.1504.1506.1508.1702.1704.1706.1708.1902.1904.
1906.1908.3502.3504.3506.3508.3102.3104.3106.3108.3702.3704.3706.3708.
3902.3904.3906.3908.5102.5104.5106.5108.5302.5304.5306.5308.5702.5706.
5708.5902.5904.5906.5908.7102.7104.7106.7108.7302.7304.7306.7308.7502.
7504.7506.7508.7902.7904.7906.7908.9102.9104.9106.9108.9302.9304.9306.
9308.9502.9504.9406.9508.9702.9704.9706.9708.
给个辛苦分吧!