17. Find out the wrong number in the series.: 1, 1, 2, 6, 24, 96, 720 September 6, 2025 by Admin [A]. 720 [B]. 96 [C]. 24 [D]. 6 ✅ The correct answer is option B. Go on multiplying with 1, 2, 3, 4, 5, 6 to get next number. So, 96 is wrong.