Identify the number that does NOT belong to the following series.
2, 14, 84, 422, 1680, 5040, 10080, 10080

Correct option is D

Series: 2, 14, 84, 422, 1680, 5040, 10080, 10080
1. 2 to 14: 2×7=14
2. 14 to 84: 14×6=84
3. 84 to 422: 84 ×5= 420 ≠ 422
4. 420 to 1680: 420 ×4= 1680
5. 1680 to 5040: 1680 ×3= 5040
6. 5040 to 10080: 5040 ×2= 10080
7. 10080 to 10080: 10080×1= 10080
Thus, the correct answer is (d) 422.