Quick Tests to Work Out if a Number is a Multiple of 2, 3, 4, 5, 8 or 9 | Divisibility Tests

In this video you'll learn all the essential divisibility tests for maths challenges and Olympiads. Includes all the tests for divisibility by 2,3,4,5,8 and 9.
This is the first video in the Mathsaurus course 'Go for Gold in Maths Challenges (age 10-13): courses.mathsaurus.com/course...
Proofs of the tests for 3 and 9 can be found here: • Quickly test if ANY nu...
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