Add them up.
2 3 5 7 11 13 17
Sum of first 7 prime numbers is equal to 2+3+5+7+11+13+17 = 58.
The sum of the smallest and largest prime numbers within 10 is 7.
11,13,19
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
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 sum of 7 and 19 is 26.
The first five prime numbers are 2, 3, 5, 7, 11. The sum of these five numbers is 28.
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.
5 and 7
5 and 2
7 + 3
17 is the only prime number that is the sum of four consecutive prime numbers. 2 + 3 + 5 + 7 = 17