The GCF is 1.
Just 43
31, 33, 35, 37, 39, 41, 43 & 45 = eight odd numbers !
32 and 25
The prime numbers between 35 and 45 are 37, 41, and 43.
31, 33, 35, 37, 39, 41, 43, 45, 47, 49
323
The only numbers between 30 and 50 that could be prime are 31, 33, 35, 37, 39, 41, 43, 45, 47, 49 because all other numbers are even. 35 and 45 cannot be prime because they are divisible by 5. 33 is divisible by 3, so it is not prime, and 49 is divisible by 7, so it is not prime. That leaves numbers 31, 37, 41, 43, 47, so there are five prime numbers between 30 and 50.
18/30 + 25/30 = 43/30 which cannot be reduced.
37, 41, 43, 47
43
31, 37, 41, 43, 47 are prime numbers from 30 to 50.
The number halfway between 27 and 43 can be found by taking the average of the two numbers. To calculate this, you add 27 and 43 together, which equals 70, and then divide by 2 to get 35. Therefore, the number halfway between 27 and 43 is 35.