SOLUTION: How many different prime numbers are factors of 1988? (Note: The number 1 is not a prime number.) A.2 B.3 C.4 D.5 E.6

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Question 251481: How many different prime numbers are factors of 1988?
(Note: The number 1 is not a prime number.)
A.2 B.3 C.4 D.5 E.6
Answer by nerdybill(7384) About Me  (Show Source):
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Factoring:
1988
.
2 994
2 2 497
2 2 7 71
2 2 7 71
.
Answer:
B. 3