Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
13, 39, 156, 780, ?
Option 1: 4460
Option 2: 4580
Option 3: 4680
Option 4: 4660
Correct Answer: 4680
Solution :
Given:
13, 39, 156, 780, ?
In the above-given series, multiply each number by consecutive numbers, starting from 3 to obtain the next number.
13 × 3 = 39; 39 × 4 = 156; 156 × 5 = 780; 780 × 6 = 4680
So, the missing number is 4680. Hence, the third option is correct.
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