31, 37, 41, 43, 47 are prime numbers from 30 to 50.
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All even numbers other than 2 are composite, so the even composite numbers between 30 and 50 are 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, and 50.
All even numbers are composite, because 2 is a factor of every even number.
33, 35, 39, 45, 49
prime: 31, 37, 41, 43, 47 composite: the others
31 ( they are : 4,6,9,10,12,14,15, 16,18,20,21,22,24,25,26,27, 28, 30, 32,33,34,35,36,38,40,42,44,45,46,48,49)