31
31
31 is prime.
31
The next prime number after 29 is 31 followed by 37
32+33+34+35+36 (31 is a prime number) = 170
31
31 is prime.
31
The next prime number after 29 is 31 followed by 37
From that list, only 31 is a prime number.
It is: 29 and 31 is also a prime number
32+33+34+35+36 (31 is a prime number) = 170
It is b: 31
31
23, 29 and 31
There are infinitely many ossible answers: 1 + 30, 2 + 29, 1 * 31, 10*3.1 2 * 15.5, 32 - 1, 33 - 2, 31/1, 62/2, etc.
All of them except for 31 and 37 which are prime numbers