Question
1500 Â Â Â 150Â Â Â 30Â Â Â ? Â Â Â Â 3.6Â Â
  1.8 What will come in the place of question mark (?) in the following number series?Solution
1500 × (10/100) = 150 150 × (20/100) = 30 30 × (30/100) = 9 9 × (40/100) = 3.6 3.6 × (50/100) = 1.8
251, 130, 274, ?, 301, 76Â
14, 17, 23, 32, ?, 59
18, 30, 54, 90, 138, ?
What will come in place of the question mark (?) in the following series?
18, 22, 34, 70, 178, ?
7   4   5   9   20    ?    160.5
4, 4, 12, 60, ?, 3780
12, 14, 20, 32, ?, 82Â
What will come in place of the question mark (?) in the following series?
45, 68, 114, 183, 275, ?
What will come in place of the question mark (?) in the following number series?
21, 42, 67, 96, ?, 166
What will come in place of the question mark (?) in the following series?
4, 2605, 5309, 8118, ?