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Q: What are the divisibility rules from 1-20?

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The divisibility rules of 4 and 9 are combined to make the divisibility rule of 36.

The answer will depend on the divisibility rules list.

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fractions help you write out divisibility rules because divisibility rules help with fractions . Glad I would help good bye

The divisibility rules for a prime number is if it is ONLY divisible by 1, and itself.

12

Jason Delaware

They were discovered, not invented.

use divisibility rules to find at least four factors of the number 19

You can always check on the divisibility of a number by dividing it into another number. But if you know the divisibility rules, you can get that information easier and faster.

Three

i think divisibility rules help with fractions because it helps you reduce the fraction to make i a simple fraction.

It isn't worthwhile to invent or memorize complicated divisibility rules for lots of numbers. Just carrying out the divisions is faster in most cases.

3 and 9. And they divide into 123456789 whether or not you use divisibility rules!

Yes.

If a number is even, then it is divisible by 2.

bogo mo!

The number 0.

0.4557

0.4557

Do the division, if there is no remainder, it is divisible. Seriously, many of the "divisibility rules" that have been discovered become more complicated than doing the actual division. For practical purposes, just learn the divisibility rules for a few simple cases (divisibility rules by 2, 4, 8, 5, 10, 3, 9, 7, 11, and 13), and for all other cases, just do the division.

For any practical purpose, it is easier to simply divide, instead of looking for fancy divisibility rules. However, you can apply the divisibility rules for 3 and for 7. This works because (a) their product is 21, and (b) these numbers are relatively prime.

Being Divisibel by 3 and 31

The rule for 1 and the rule for 3.

the last number should be an even number.