13. Find out the wrong number in the series.: 40960, 10240, 2560, 640, 200, 40, 10 September 6, 2025 by Admin [A]. 640 [B]. 40 [C]. 200 [D]. 2560 ✅ The correct answer is option C. Go on dividing by 4 to get the next number. So, 200 is wrong.