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Definition: Prime number -- the only factors that can go into the number are 1 and itself. Their are simple tricks: numbers that end in 2, 4, 6, 8, 0, and 5 are not prime.My method just makes it easy to know which ones aren't prime.

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15y ago
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15y ago

its preety easy a prime number is a number that has no factors.there are no numbers you can mulitply together to get that number.

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Q: How do you tell whether a number is prime or not?
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How can I tell wet her a number is prime?

One can tell whether a number is prime if it got only two divisors which is 1 and the number itself.


How can you tell whether za number is prime?

A number is prime if it only has two distinct factors.


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Can you tell a prime or composite number by seeing if its odd or even?

You cannot. If a number is even - other than 2 - then it is a composite number. However, if it is odd, it is not easily possible to tell whether it is prime or composite.


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101, 173 and 911 are all prime numbers. 173911 is not.


How do you tell whether a number is prime or composite?

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How could you use prime factorization to tell whether a number is even or odd?

its easy to tell that if the last number ends with 0,2,4,6,8,10,12,14,16,18,20 so on and so on then its even if the answer starts with a 1,3,5,7,9,11,13,15,17,19 so on so on then its an odd number


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How can you decide whether a number is a prime number?

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