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.
33, 35, 39, 45, 49
All even numbers are composite, because 2 is a factor of every even number.
prime: 31, 37, 41, 43, 47 composite: the others
31, 37, 41, 43, 47 are prime numbers from 30 to 50.