Which of the following numbers will replace the question mark (?) in the given series?
641, 647, 659, 673, 683,?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3. i.e. 701.
The series follows this pattern:
The given series is a prime number series starting from 641 and one prime number is skipped in between them.
Series of prime numbers: 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701
The skipped numbers are: 643, 653, 661, 677, 691
So, the series is 641, 647, 659, 673, 683, 701