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Earn +20 ptsQ: Why is knowing if a number is prime important?
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How do you figure out prime numbers not knowing there factors?
But you do know the factors of prime numbers. Every prime number has two factors: one and the number itself.
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.
Why 7 is not a prime number?
7 is a prime number!
Is a 135 prime?
A Prime number is a number that is not divisible into whole numbers, except by itself and one. 135 is not a prime number as it is divisible by 5 with a ressulting quotient of 27.
Is 109 a prime number or a composite number?
109 is a prime number.
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