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I am Lyosha [343]
3 years ago
14

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

Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
6 0
11 is the only prime number. It's only multiples are 1 and itself
vaieri [72.5K]3 years ago
5 0
11 because only 1 times 11 = 11 and it has no other factors 
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Hello from MrBillDoesMath!

Answer:

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The terms are 12, 9, 6, 3  so we are apparently subtracting 3 from each succeeding term. . Hence

a(n) = 12 - 3(n-1)          , n = 1,2,3.,,


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