Mathematics, 21.04.2020 18:49 leannesmith90101

Is the sum of 2 primes numbers always a prime? Is the
product of 2 prime numbers always prime? Which digits can
or cannot be in the ones column of prime numbers? Why or
why not?

Answers: 3

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Is the sum of 2 primes numbers always a prime? Is the
product of 2 prime numbers always prime?...