Creating Divisibility Tests
Read this topicExplanations 2
- Modulo Arithmetic : Some useful divisibility tests Previous part We'll use modulo arithmetic to show some famous and useful in practice divisibility tests. Firstly, let's start …
By Zi Song Yeoh, Expii Team, Victor Wang
- Let's start by explaining the divisibility rule for 999. Take a number, such as 346534653465. Any number can be broken down into a place value with coefficient form, like 346534…
By Vivian Loh
Problems 2
- The number 123454321123454321123454321 is written on a blackboard. Evan walks by and erases some (but not all) of the digits, and notices that the resulting number (when spaces …
- For k>0k > 0k>0, let Ik=10…064I_k = 10\ldots 064Ik=10…064, where there are kkk zeros between the 111 and the 666. Let N(k)N(k)N(k) be the number of factors of 222 in the prime …