What should come in place of the question mark ‘?’ in the given series? 81, 84, 90, 99, 111, ?
Question and options
What should come in place of the question mark ‘?’ in the given series? 81, 84, 90, 99, 111, ?
- 135
- 129
- 126
- 141
Answer and explanation
Correct answer: C - 126
The differences are 3, 6, 9, 12, so the next difference is 15 and 111+15=126.
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