36 = 10*9*4
The last digit must be 0.
The digital root (sum of digits) must be divisible by 9.
By the first requirement, above, the number must be divisible by 10. The quotient, after division by 10, must be divisible by 4.
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i think divisibility rules help with fractions because it helps you reduce the fraction to make i a simple fraction.
3 and 9. And they divide into 123456789 whether or not you use divisibility rules!
0.4557
0.4557
Oh honey, divisibility rules have been around longer than your grandma's secret meatloaf recipe. But if you want a name to drop at your next trivia night, credit goes to good ol' Euclid. He's the OG mathematician who laid down the law on how numbers can play nice and divide evenly.