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Which of the following numbers is not a prime number? A) 13 B) 17 C) 18 D) 19 E) 23
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1 vote
Which of the following numbers is not a prime number?

A) 13
B) 17
C) 18
D) 19
E) 23

User DrJones
by
5.5k points

2 Answers

4 votes
18 is not a prime number
User David Skarbrevik
by
5.1k points
3 votes
C) 18 is not a prime number
1, 2, 3, 6 ,9, 18
Are all factors of 18, making it not prime
User Jerry Liu
by
5.2k points
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