Select the number from among the given options that can replace the question mark (?) in the following series.
13, 39, 156, 780,?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4680.
The series follows this pattern:
13 × 3 = 39, 39 × 4 = 156, 156 × 5 = 780, 780 × 6 = 4680