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The Prime Numbers between 50 and 60 are: 53 and 59.
Prime numbers between 55 and 65 are 59 and 61.
The odd composite numbers between 50 and 60 are 51, 55, and 57. Because all the primes are odd except for 2 and adding two odd numbers will result in an even number, one of the two prime numbers must be 2, which when added to an odd number will result in an odd number. So, we subtract 2 from each of these numbers and check whether it is prime. 51 - 2 = 49, which is not prime. 55 - 2 = 53, which is prime. 57 - 2 = 55, which is not prime. Thus, the number is 55, which can be written as 2 + 53.
61 and 67 are the only prime numbers between 60 and 70.
number of prime numbers between 45 and 60 = 3 prime numbers between 45 and 60 = 47 53 59