From that list, only 31 is a Prime number.
31 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.
All of them except for 31 and 37 which are prime numbers
31, 32, 33
there are 3 prime numbers in between 21 and 33... they are 23,29, 31.
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