Problem 42410. Divisible by 8

Created by goc3

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Pursuant to the</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2\"><w:r><w:t>first problem</w:t></w:r></w:hyperlink><w:r><w:t> in this series, this one involves checking for divisibility by 8.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Write a function to determine if a number is divisible by 8. This can be done by the following method:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"ListParagraph\"/><w:numPr><w:numId w:val=\"2\"/></w:numPr></w:pPr><w:r><w:t>Check the last three digits for divisibility by eight. If that portion of the number is divisible by eight, then so is the original number. That three-digit number can be further reduced by summing four times the hundreds digit, two times the tens digit, and the ones digit. As with methods for other numbers, this factor/sum step can be applied recursively until a single-digit number results.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Previous problem:</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/matlabcentral/cody/problems/42409-divisible-by-7\"><w:r><w:t>divisible by 7</w:t></w:r></w:hyperlink><w:r><w:t>. Next problem:</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/matlabcentral/cody/problems/42411-divisible-by-9\"><w:r><w:t>divisible by 9</w:t></w:r></w:hyperlink><w:r><w:t>.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

352 Solutions
108 Solvers

Last Solution submitted on Dec 30, 2020

Last 200 Solutions

Solution Comments

Solution 1281160

3 Comments

3 Comments

Richard Blair on 4 Oct 2017

I don't why this does not pass, case 10 fails, even though this number is not divisible by 8 despite the case saying it does. Furthermore, I pass case 16 which has case 10 referenced but fail case 15 with the same case 10.

Any suggestions please!

James on 4 Oct 2017

Look *very* carefully at your definition of eightTable, and look at the last three digits of case 10.

Richard Blair on 6 Oct 2017

Thank James, obvious now that you said it :)

Problem Recent Solvers108

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 42410. Divisible by 8

Solution Stats

Last 200 Solutions

Solution Comments

Problem Recent Solvers108

Suggested Problems

More from this Author139

Problem Tags

Community Treasure Hunt

Problem 42410. Divisible by 8

Solution Stats

Last 200 Solutions

Solution Comments

Problem Recent Solvers108

Suggested Problems

More from this Author139

Problem Tags

Community Treasure Hunt

Players