Question
200 Â Â Â 20Â Â Â 4 Â Â Â Â ? Â Â Â Â 0.48Â Â Â
 0.24 What will come in the place of question mark (?) in the following number series?Solution
200 × (10/100) = 20 20 × (20/100) = 4 4 × (30/100) = 1.2 1.2 × (40/100) = 0.48 0.48 × (50/100) = 0.24
612, 487,?, 396, 388, 387
Find the missing number in the given number series.
1, 2, 6, 24, 120, ?What will come in place of the question mark (?) in the following series?
36, 85, ?, 230, 330, 451
Find the missing term in the series:
2, 5, 11, 23, 47, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
44   45    41   50    ?      59    23
...221, 100, 0, -81, ?
...900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
16, 20, 11, 27, ?, 38
37, 57, 82, ?, 147, 187