SOLUTION: which of the following groups of numbers are all prime numbers? a)2,3,5,9 b)3,11,23,31 c)2,5,15,19 d)7,17,29,49

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: which of the following groups of numbers are all prime numbers? a)2,3,5,9 b)3,11,23,31 c)2,5,15,19 d)7,17,29,49      Log On


   

Question 232459: which of the following groups of numbers are all prime numbers?
a)2,3,5,9
b)3,11,23,31
c)2,5,15,19
d)7,17,29,49
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Ans: b
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Cheers,
Stan H.