5 and 37 are prime.
12 and 18 are composite.
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32, 9, 18, 51
47, 29 & 37 are prime numbers while 49 is a composite number.
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27
Of the numbers in your question, three are prime, and one is composite. The three prime numbers are 13, 37, and 101, and the composite number is 91. 91 is equal to 13 x 7.