What should come in place of '?' in the given series?
21, 60, 177, 528, 1581, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4740.
Given series: 21, 60, 177, 528, 1581, ?
21 × 3 - 3 = 63 - 3 = 60
60 × 3 - 3 = 180 - 3 = 177
177 × 3 - 3 = 531 - 3 = 528
528 × 3 - 3 = 1584 - 3 = 1581
1581 × 3 - 3 = 4743 - 3 = 4740
So, the next term in the series is 4740.