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Divisibility rules 11
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I am completing an assignment and had to look for patterns with the number 11. I now need to prove 2 of my findings but can't can you help please. If I have the number 81752 I know that 8+7+2 -1+5 = 11 so its divisible by 11. How do I prove this using albebra Also if I take the same number now...
Divisibility Tests
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Does anyone know of a quick test for divisibility by 7? I've mastered the tests for divisibility by 2, 3, 4, 5, 6, 8, 9, 10, 11 and any composite number beyond 11. I know that a test for 7 exisits and I'd like to know what it is. Thanks. View more questions Search
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