tag:blogger.com,1999:blog-2491397765324980963.post8543188119460392170..comments2024-03-27T14:44:50.719+05:30Comments on WELCOME TO THE EXCITING WORLD OF MATHEMATICS: Divisibility rules for 7, 13, etc.Amit Bajajhttp://www.blogger.com/profile/13191271162965966420noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2491397765324980963.post-7487629704932148602009-07-20T21:59:35.075+05:302009-07-20T21:59:35.075+05:30This is very interesting. I had been trying to fin...This is very interesting. I had been trying to find a rule for seven also. Before I stumbled across this rule you have here, all I would do is put the closest divisible in my head to that number and subtract it from the number in question, then if that answer was for example 105, then I would know that number was a divisible of seven. I'm glad to see someone come up with a defined rule that works. Good job.torn80cjhttps://www.blogger.com/profile/12454049251676068602noreply@blogger.com