Question

A student was asked to find the sum of all the prime numbers between $10$ and $40.$He found the sum as $180.$Which of the following statements is true?

• A. He missed one prime number between $10$ and $20$
• B. He missed one prime number between $20$ and $30$
• C. He added one extra prime number between $10$ and $20$
• D. None of these

Answer 1

The correct option is D None of these

Prime numbers between $10$ and $40$ are $11,13,17,19,23,29,31,37$
Sum of these prime numbers $=180$
$\therefore$ Option $D$ is correct.