KeerthanaPosted on In the following question, select the missing number from the given series. 84, 42, 28, 21, ? a10.5 b16.8 c18.4 d19.6 Answer : Option BExplanation : 84 – 42 = 42 42 – 14 = 28 28 – 7 = 21 Rate This:NaN / 5 - 1 votesAdd comment