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Which of these numbers is prime? large 11, 15, 21, 27, 56

Which of these numbers is prime? large 11, 15, 21, 27, 56
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4 votes
Which of these numbers is prime? large 11, 15, 21, 27, 56

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User Omiod
by
8.5k points

2 Answers

3 votes
11 because only 1 times 11 = 11 and it has no other factors 
answered
User Dolf Andringa
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8.5k points
0 votes
11 is the only prime number. It's only multiples are 1 and itself
answered
User Japzone
by
7.9k points
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