The first 8 prime numbers are 2, 3, 5, 7, 11, 13, 17, and 19. Their sum is 77.
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The sum first Prime number is (2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 ) = 129 The sum of the first composite numbers is (4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18) = 112 The difference is 129 - 112 = 17 !!!!!
3 and 5
The sum of the first 8 odd numbers is 64.
The mean average of a set of numbers is the sum of the numbers divided by how many of them there are. If there are 8 numbers with a sum of 2464, their mean average is 2464 ÷ 8 = 308.
17 is a prime number. 8 and 12 are not prime numbers.