Concept:A prime number is a natural number greater than 1 that has exactly two factors: 1 and itself. The smallest prime is 2, and it is the only even prime number.
Explanation:The first five positive prime numbers are 2, 3, 5, 7, and 11. These are the smallest primes in ascending order.
Add them step by step: 2 + 3 = 5; 5 + 5 = 10; 10 + 7 = 17; 17 + 11 = 28.
So the total sum is 28. Remember: 1 is not a prime number, so we start counting from 2.
Answer:The sum of the first five positive prime numbers is 28, which is option C.