The largest prime less than 20 is 19. The largest prime over 60 is 61. The sum of these two numbers is 80.
Two: 53 and 59
The prime numbers less than 60 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, and 59.
59 - 2 = 57
17, 31, and 59
There are 17 of them
The largest prime less than 20 is 19. The largest prime over 60 is 61. The sum of these two numbers is 80.
Two: 53 and 59
The prime numbers less than 60 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, and 59.
59 - 2 = 57
17, 31, and 59
30 (2 x 3 x 5) and 42 (2 x 3 x 7) are the only numbers less than 60 having three different prime factors.
The prime numbers from 35 to 60 are 37,41,43,47,53,59.
80
There are 30 whole numbers that are odd numbers less than 60 which are also positive. Otherwise, there are infinitely many of them.
53 and 59 are the prime numbers that are greater than 50 and less than 60
2