SOLUTION: Which number is prime? A) 1 B) 8 C) 42 D) 61

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Question 37929: Which number is prime?
A) 1 B) 8 C) 42 D) 61
Answer by fractalier(6550) About Me  (Show Source):
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D. Only 61 has only itself and 1 as a factor. The number 1 (choice A) doesn't count.