Some more Divisibility Rules

Kanojiya, Rajkumar (2023) Some more Divisibility Rules. At Right Angles. pp. 39-41. ISSN 2582-1873

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Divisibility rules for a divisor p are algorithms that tell us whether a given number is divisible by p or not. From the lower grades we are familiar with divisibility rules for the divisors 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, but when it comes to prime divisors greater than 10, we are clueless. In this article, I show how one can find tests of divisibility for divisors such as 13, 17, 19, 23, 29, …. I focus on divisibility by 13, 17 and 19, and give examples. These methods are not unique; readers may come up with other ways to check divisibility by these numbers.

Item Type: Articles in APF Magazines
Authors: Kanojiya, Rajkumar
Document Language:
Uncontrolled Keywords: Triangles, Ratios, Square-Roots, Exploration, Reasoning, Discussion
Subjects: Natural Sciences > Mathematics
Divisions: Azim Premji University > University Publications > At Right Angles
Full Text Status: Public
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