https://mathresearch.utsa.edu/wiki/index.php?action=history&feed=atom&title=Divisibility_TestsDivisibility Tests - Revision history2026-09-20T13:02:11ZRevision history for this page on the wikiMediaWiki 1.34.1https://mathresearch.utsa.edu/wiki/index.php?title=Divisibility_Tests&diff=4117&oldid=prevKhanh: Created page with "Divisibility rules of whole numbers are very useful because they help us to quickly determine if a number can be divided by 2, 3, 4, 5, 9, and 10 without doing long division...."2021-12-11T21:52:54Z<p>Created page with "Divisibility rules of whole numbers are very useful because they help us to quickly determine if a number can be divided by 2, 3, 4, 5, 9, and 10 without doing long division...."</p>
<p><b>New page</b></p><div>Divisibility rules of whole numbers are very useful because they help us to quickly determine if a number can be divided by 2, 3, 4, 5, 9, and 10 without doing long division. This is especially useful when the numbers are large.<br />
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== Divisibility Rule of 1 ==<br />
Any integer that is not a fraction is divisible by 1.<br />
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Eg:- 23, 84, 974, 1023<br />
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== Divisibility Rule of 2 ==<br />
If a number is an even number or a number whose last digit is an even number.<br />
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Eg:- 0, 2, 4, 6, 8, 10<br />
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== Divisibility Rule of 3 ==<br />
When the sum of all digits of a number is a multiple of 3.<br />
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Eg:- 516, 36, 119, 5502<br />
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== Divisibility Rule of 4 ==<br />
The number formed by last 2 digits is divisible by 4.<br />
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Eg:- 92, 780, 52, 300<br />
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== Divisibility Rule of 5 ==<br />
When the ones digit of the number is either 0 or 5.<br />
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Eg:- 55, 125, 1000, 760<br />
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== Divisibility Rule of 6 ==<br />
A number is divisible by 6 if it is divisible by 2 and 3 also.<br />
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Eg:- 270, 630, 144, 42<br />
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== Divisibility Rule of 7 ==<br />
When the difference between twice the digits at ones place and the number formed by other digit is either zero or a multiple of 7.<br />
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Eg:- 1073, 98, 56, 140<br />
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== Divisibility Rule of 8 ==<br />
The number formed by last 3 digits is divisible by 8.<br />
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Eg:- 1792, 1824, 2000, 2880<br />
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== Divisibility Rule of 9 ==<br />
When the sum of all digits of a number is a multiple of 9.<br />
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Eg:- 51984, 2979, 9000, 135<br />
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== Divisibility Rule of 10 ==<br />
When the ones digit is zero.<br />
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Eg:- 1000, 150, 670, 280</div>Khanh