SOLUTION: If p and r are prime numbers, which of the following must also be prime? A p+r b pr+1 c p^2 + r^2 d none of above

SOLUTION: If p and r are prime numbers, which of the following must also be prime? A p+r b pr+1 c p^2 + r^2 d none of above

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Question 274568: If p and r are prime numbers, which of the following must also be prime?
A p+r b pr+1 c p^2 + r^2 d none of above

Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
Answer is D) none of the above:
Proof:
3+5=8 not prime.
3*5+1=15+1=16 ditto.
3^2+5^2=9+25=34 ditto.

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