klalalalala klalalalala
  • 05-09-2015
  • Mathematics
contestada

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

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AL2006
AL2006 AL2006
  • 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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TSO
TSO TSO
  • 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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