如何判断一个数是否是七的倍数

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select * from tbl_Articles WHERE ArticleID=2825455 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2825455 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2825455 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1131227,1055081,1062000,1070668,1052887,1128609,1059801,2644343,1062930,1129029,1090537,1062774,1091177,1117189,1114866,1043609,1088906,1016441,1345992,1110620,1100799,1128008,1051655,990402,1049946,1046666,1067895,1086122,1099583,1275346) ORDER BY field (ArticleID,1131227,1055081,1062000,1070668,1052887,1128609,1059801,2644343,1062930,1129029,1090537,1062774,1091177,1117189,1114866,1043609,1088906,1016441,1345992,1110620,1100799,1128008,1051655,990402,1049946,1046666,1067895,1086122,1099583,1275346)