Multiple choice general knowledge math & puzzles

9, 49, 201, 1009, ? ,20209, 80841Find the missing number in the series

  1. 4041

  2. 4042

  3. 2021

  4. 2022

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern is: each term × 4 + alternating increment (13, 5, 5, 13, 13). 9×4+13=49, 49×4+5=201, 201×4+5=1009, 1009×4+13=4041, 4041×4+13=20209, 20209×4+13=80841.