What is the sum of the first five prime numbers?

• A. 20
• B. 24
• C. 28
• D. 30

Answer: (C)

To find the sum of the first five prime numbers, we first need to identify what the prime numbers are. Prime numbers are those greater than 1 that have no positive divisors other than 1 and themselves.

The first five prime numbers are:

2, 3, 5, 7, and 11.

Now, let's calculate their sum step by step:

1. Start with the first two prime numbers:

2 + 3 = 5.

2. Add the next prime number, which is 5:

5 + 5 = 10.

3. Then add the next prime number, which is 7:

10 + 7 = 17.

4. Finally, add the last in this set, which is 11:

17 + 11 = 28.

Thus, the sum of the first five prime numbers is 28. This matches the answer provided, confirming it's the correct choice. Understanding the definition and identification of prime numbers is essential in solving this question effectively, as it helps in accurately calculating sums that involve these fundamental mathematical concepts.