30 32 33 34 35 36 38 39 40 42 44 45 46 48 49 50
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prime are >
31, 37, 41, 43, 47
so composite are >
32 33 34 35 36 38 39
40 42 44 45 46 48 49
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, 37, 41, 43, 47 are prime numbers from 30 to 50.