100 can be expressed as the sum of two primes in 6 different ways (ignoring order):
100 = 3+97 = 11+89 = 17+83 = 29+71 = 41+59 = 47+53
100 = 62 + 82 = 82 + 62 and there is no other way
12=5+7
Each one of them can be expressed as a sum of two primes.
Write 92 as the sum of two primes
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
The sum of the 25 primes less than 100 is even (it is 1060).The first prime number is 2. Every other prime number is odd.So, of the 25 primes less than 100, one is even and 24 are odd.Any two odd numbers sum to an even number. Therefore, an even number of odd numbers has an even sum. So the sum of 24 odd numbers is even.Therefore, the sum of the 25 primes less than 100 is even.
The sum of two odd primes is always an even answer or number.
1 + 17 = 18 5 + 13 = 18 7 + 11 = 18
19 and 43 are two primes having 62 as their sum.
It is: 19+79 = 98
5
It is: 2+13 = 15