A number is a multiple of 60 if it's a multiple of 3 and 20 at the same time. It also works with 4 and 15, 5 and 12, or 3, 4 and 5
60 = 2² x 3 x 5 = 3 x 4 x 5 = 3 x 20 = 4 x 15 = 5 x 12
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By tautology. If it did not work, it would not be a divisibility rule!
What is the divisblity rule by 8
There is no easy rule for divisibility by 34.
Able to Be Divided
Division by zero is undefined.