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05-09-2015
Mathematics

contestada

why is every number with a 5 in the ones place not prime

Respuesta :

05-09-2015

Well, not exactly EVERY one of them. The number ' 5 ' is a prime. But all the others are multiples of 5, so they're not primes.

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05-09-2015

Every number that ends with a 5, besides 5, is not a prime number because it is divisible by 5. Prime numbers are only divisible by themselves and 1.

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