tag:blogger.com,1999:blog-5544661968326910027.post495238171284756013..comments2024-02-05T02:24:14.386-08:00Comments on Three J's Learning: Divisible by 3JGR314http://www.blogger.com/profile/11702319994021721608noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-5544661968326910027.post-83205260609587183572015-03-30T01:37:27.915-07:002015-03-30T01:37:27.915-07:00Yes, that's a nice idea. I wonder, can you use...Yes, that's a nice idea. I wonder, can you use that test to prove this result from Ben Vitale:<br /><a href="https://benvitalenum3ers.wordpress.com/2015/03/25/divisibility-by-7-6n-digit-number/" rel="nofollow">https://benvitalenum3ers.wordpress.com/2015/03/25/divisibility-by-7-6n-digit-number/</a>JGR314https://www.blogger.com/profile/11702319994021721608noreply@blogger.comtag:blogger.com,1999:blog-5544661968326910027.post-59474638565364664522015-03-28T09:28:25.159-07:002015-03-28T09:28:25.159-07:00If you convert a base 10 number in base 8, then yo...If you convert a base 10 number in base 8, then you can use the digital root divisibility test for testing divisibility by 7.<br /><br />e.g. 329<br /><br />which has a base 8 of 511<br /><br />Then 5 + 1 + 1 = 7<br /><br />Thus, 329 is divisible by 7 <br /><br />329/7 = 47Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5544661968326910027.post-71303666200540100222015-02-24T01:04:40.487-08:002015-02-24T01:04:40.487-08:00The blog Math Recreation talks about a divisibilit...The blog Math Recreation talks about a divisibility rule for 11 in this interesting <a href="http://www.mathrecreation.com/2015/01/bus-number-factoring.html?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+Mathrecreation+%28mathrecreation%29" rel="nofollow">post.</a><br /><br />Be warned: even if you read this, there is still an alternative, but related form of test you can find for 11.JGR314https://www.blogger.com/profile/11702319994021721608noreply@blogger.com