Well, all prime numbers other than 2 are odd. There are only 2 odd numbers between 45 and 50: 47 and 49. And one of them is a square number: 49=7*7. What remains is the only one you should need to check: 47.
The Prime Numbers between 50 and 60 are: 53 and 59.
The numbers 53, 59, 61 and 67 are prime.
The answer is 45.
Since 40 + 5 = 45 and 50 - 5 = 45, 45 is exactly between 40 and 50. It is not closest to either number.
The prime numbers between 40 and 50 are 41, 43, 47. So their sum is 131.
The prime number is 47 and 4+7 = 11
47 is the largest prime number between 20 and 50.
The Prime Numbers between 50 and 60 are: 53 and 59.
The only prime number between 50 and 59 is 53.
A number between 50 and 200 is 125 Its prime factors are: 5, 5 and 5 or 53 = 125
The numbers 53, 59, 61 and 67 are prime.
The answer is 45.
23
53
Since 40 + 5 = 45 and 50 - 5 = 45, 45 is exactly between 40 and 50. It is not closest to either number.
The answer is 47 / 47.5. I calculated it by adding 45 and 50, then divided it by 2.
The only even prime number is 2.