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Which number is a composite number 2312 or 3819 and how do you know?
Wiki User
∙ 9y ago
Both numbers are composite numbers. Using the rules of divisibility, 2312 is composite because it is an even number that ends with 0, 2, 4, 6, or 8. 3819 is composite because the sum of its digits equal 21, a number that is divisible by 3, so the number itself is divisible by 3.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoThey are both composite numbers because they have more than two factors
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Circle the number below that are completely how do you know they are composite numbers 2312 3819?
They are both composite numbers because they have more than two factors
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You know 120 is a composite number because it is an even number that is greater than 2.
How do you know it is a composite number?
A number is composite if it has more than two factors. Once you find a third, you know.
Is 649 prime or composite?
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We know that 28 is a composite number because:It is an even numberIt is divisible by more than 2 numbers
Do you need to know all of the factors of number to know if it is prime or composite?
No, if a number has even one additional factor besides itself and the number one, then you automatically know it's composite.
How do you determine a composite number?
Composite numbers have more than two factors. Once you find a third factor, you know your number is composite.
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Composite: i know it can at least be divided by 2 and 3
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dont know dont care
Do you need to know all of the factors of a number to know it is prime or composite?
To know that a number is prime you need to know that it has no factors other than 1 and the number itself.To know that a number is composite you only need to know one factor other than the number itself or 1.
Is 83 composite-?
For goodness sake! This will be on a test one day and you will not know it! But, the answer is no, it is prime
Why is it important to know if a number is prime or composite?
A prime number can never be composite in any case. There is an exception for 2 which is both.
