个位上的数是4,且能被3整除的三位数有几个?快快快快快快快快快快快快快快快快快快快快快快快快快!

2022-09-01 13:42

2022-09-01 17:54
114,204,504,414,324,234,144,804,714,624,534,444,354,264,174,294,384,474,564,654,744,834,924,954,864,774,684,594,894,984,共30个。(关键是凑前两位数字和被3除余2的,2,5,8,11,14,17)
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个位上的数是4,且能被3整除的三位数有30个
问题一:204,504,804,114,414,714,324,624,924,234,534,834,144,444,744,354,654,954,264,564,864,684,984,384,774,474,174,894,594,294