They are all the numbers except 31 37 41 43 and 47 which are prime numbers because they have only two factors
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33, 35, 39, 45, 49
15, 49, 55, 87, 91,105 are the composite numbers.
47, 29 & 37 are prime numbers while 49 is a composite number.
49, 50, 51, 52, 54 and 55 are the composite numbers between 48 and 56.
40, 42, 44, 45, 46, 48, 49, 50