31
31
They are: 23, 29 and 31
23 29 31.
The composite numbers between 30 and 40 are: 32, 33, 34, 35, 36, 38 and 39. The prime numbers between 30 and 40 are 31 and 37. Note: 30 and 40 are also composite numbers.
All of them except for 31 and 37 which are prime numbers
31 and 23 are prime numbers.
It is b: 31
31
31
They are: 23, 29 and 31
23 29 31.
The composite numbers between 30 and 40 are: 32, 33, 34, 35, 36, 38 and 39. The prime numbers between 30 and 40 are 31 and 37. Note: 30 and 40 are also composite numbers.
32+33+34+35+36 (31 is a prime number) = 170
The prime numbers up to 32 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and 31
They are: 17 19 23 29 and 31
30, 31, 3230, 31 and 32.