31 37 41 43.
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31 37 41 43.
They are: 31, 37, 41 and 43
prime number between 45 and 48 = 47
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.
There are five prime numbers between 45 and 70: 47 53 59 61 67.