SSC CHSL 3 FEB 2017 SHIFT 3 TIER 1 REASONING QUESTION 12

series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
12, 60, 240, 720, ?
Options:
1. 1440
2. 1420
3. 1400
4. 1480
Answer: 1440

12, 12 * 5, 60 * 4, 240 * 3, 720 * 2, 1440 * 1

Next term in above series will be = 720 * 2 = 1440