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What divisibility rules can be used to find the factor pairs of 80?
Those for 1, 2, 4, 5 and 8.
What are the divisibility rules to find at least four factors of the number 312?
A number is a multiple of 312 if it's a multiple of 3, 8 and 13 at the same time
How can knowing the divisibility rules help to determine if a number is prime or composite?
Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.
What are the divisibility rules of 18?
If the number is even and the sum of its digits is divisible by nine then the number is divisible by 18.
What is a divisibility rule for 5?
If the rules for 2 and 3 work, the number is divisibale by 5.
What are the divisibility rules of all prime numbers?
The divisibility rules for a prime number is if it is ONLY divisible by 1, and itself.
What are reasons of using the disivility rules?
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.
What number goes into all of the divisibility rules?
The number 0.
How many numbers can divided by that number?
divided by what number use your divisibility rules
What does it means to use the divisibility rules to find factor pairs for eighty?
Factors are divisors. If you know the divisibility rules, you know that 80 is divisible by 1, 2, 4, 5 and 8. If you divide 80 by those numbers, you find the other half of the factor pairs.
What divisibility rules can be used to find the factor pairs of 80?
Those for 1, 2, 4, 5 and 8.
What are the divisibility rules to find at least four factors of the number 312?
A number is a multiple of 312 if it's a multiple of 3, 8 and 13 at the same time
What is divisibility rules for 15?
If a number is divisible by 3 and 5, it is divisible by 15.
How can knowing the divisibility rules help to determine if a number is prime or composite?
Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.
What are the divisibility rules of 18?
If the number is even and the sum of its digits is divisible by nine then the number is divisible by 18.
What is a divisibility rule for 5?
If the rules for 2 and 3 work, the number is divisibale by 5.
What are the divisibility rules for 9?
a number is divisible by 9 if the sum of the digits is divisible by 9.
