5 and 2
The sum of any two prime numbers may or may not be prime. The sum of the two prime numbers 2 and 3 is the prime number 5, and the sum of the two prime numbers 5 and 7 is the composite number 12.
2, 7 AND 31
17 is the only prime number that is the sum of four consecutive prime numbers. 2 + 3 + 5 + 7 = 17
The sum of the first six prime numbers is 41 (2 + 3 + 5 + 7 + 11 + 13 = 41).
The smallest four prime numbers are 2, 3, 5, 7, and their sum happens to be a prime.
Sum of first 7 prime numbers is equal to 2+3+5+7+11+13+17 = 58.
The sum of any two prime numbers may or may not be prime. The sum of the two prime numbers 2 and 3 is the prime number 5, and the sum of the two prime numbers 5 and 7 is the composite number 12.
The only two prime numbers for which this can be the case are 2 and 5 - since one of the prime numbers has to be even.
7 + 3
2 + 2 + 3 = 7
The first five prime numbers are 2,3,5,7,11. The sum of the first five prime numbers is 28.The sum is: 2+3+5+7+11 = 28
2, 7 AND 31
The first five prime numbers are 2, 3, 5, 7, 11. The sum of these five numbers is 28.
17 is the only prime number that is the sum of four consecutive prime numbers. 2 + 3 + 5 + 7 = 17
7 and 2
2 and 5
5 = 2+3 = 7-2