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 ->  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

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Question 232460: 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 rfer(10417) About Me  (Show Source):