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Which of these has the LEAST number of factor pairs? A.6 B.9 C.18 D.19

Which of these has the LEAST number of factor pairs? A.6 B.9 C.18 D.19
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Which of these has the LEAST number of factor pairs?

A.6
B.9
C.18
D.19

User Wang Liang
by
8.3k points

2 Answers

2 votes
d, because 19 is a prime number, so it's only factor pair is 19 and 1
User Jchatard
by
7.2k points
7 votes
6 = 1 x 6, 2 x 3
9 = 1 x 9, 3 x 3
18 = 1 x 18, 2 x 9, 3 x 6
19 = 1 x 19.
Your answer is D.) 19.
User Mark Hetherington
by
8.0k points
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