KeerthanaPosted on 21, 30, 38, ? , 51, 56, 60 a55 b80 c35 d45 Answer : Option DExplanation : 21 + 9 = 30 30 + 8 = 38 45 + 6 = 51 51 + 5 = 56 56 + 4 = 60 Rate This:NaN / 5 - 1 votesAdd comment
