Question

The sum of prime numbers, out of the numbers $17,8,21,13,41,2,27,31,51$ is:

• A. $125$
• B. $102$
• C. $104$
• D. $155$

Answer 1

The correct option is C

$104$

Step 1: Prime numbers

Prime numbers are natural numbers that are divisible by only $1$ and the number itself.

Step 2: Explanation for the correct answer

Option (c): $104$

Given numbers are $17,8,21,13,41,2,27,31,51$.

Prime numbers are $2,17,13,41,31$.

Sum of prime numbers $=2+17+13+41+31$$=104$

Thus, option (c) is the correct answer.

Step 3: Explanation for the incorrect answer

Option (a): $125$

Option (b): $102$

Option (d): $155$

By adding the prime numbers $2,17,13,41,31$ we get $104$.

Thus, option (a), (b) and (d) are incorrect answers.

Hence, option (c) is the correct answer.