Which of the following numbers will replace the question mark (?) in the given series?
7, 50, 351, 2458, ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 17207.
7 × 7 + 1 = 50, 50 × 7 + 1 = 351, 351 × 7 + 1 = 2458, 2458 × 7 + 1 = 17207