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531 is a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
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Earn +20 ptsQ: Is each number prime composite or neither 531?
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Are two composite number maybe relatively prime to each other?
no
Is 37 and 42 prime or composite?
37 is prime, 42 is composite.
Do you need to know all the factors of a number to decide if its prime or composite?
No. If the number has one factor (other than 1 and itself) it is a composite. However, to establish that a number is prime it needs to be checked for divisibility by each prime number up to the square root of the number. If the only factor found is 1, then it is a prime.
Is 15 and 30 prime or composite?
15 and 30 are both composite numbers because each has more factors than 1 and the number itself.
Are 15 and 24 prime number?
Neither 15 nor 24 are prime numbers. Each has more factors than 1 and the number itself.
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