40 and 50 are both composite numbers because they have more than two factors
47 - 31 = 16
47.
43, 47
47
47
41, 43, 47
42
The prime numbers between 40 and 50 are 41, 43, 47. So their sum is 131.
41, 43, 47
41, 43, and 47
They are: 41, 43 and 47
No multiple of 86 is in that range. 43 is a prime number that is a factor of 86.