From that list, only 31 is a Prime number.
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∙ 2014-05-08 17:16:2631 is prime.
31
31 is prime. 32 and 33 are composite.
31
31
It is b: 31
The greatest common factor of 31, 32, and 33 is 1.
31, 32, 33
All of them except for 31 and 37 which are prime numbers
The factors of 31 are: 1, 31 The factors of 32 are: 1, 2, 4, 8, 16, 32 The factors of 33 are: 1, 3, 11, 33
31+32+33 = 96
1 is the GCF of 33 and 31 because 31 is a prime number.