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The correct answer is D
Select the number from among the given options that can replace the question mark (?) in the following series.
2, 6, 12, 20, ?, ?
32, ?, 41, 68, 132, 257
...There are 3 series, you have to find value of a, b, c and then establish relation among a,b,c.
19, 25, 45, a, 553, 2767
1560 760 360 160 6...
The following expressions form a series followed by a (?). Find the odd one out first and then find that what will come in place of the question mark (?...
462 478 510 558 ?
...35.25 71 146 296 624 1376
...12Â Â Â Â Â Â Â Â Â Â Â Â Â 10Â Â Â Â Â Â Â Â Â Â Â Â 13Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 18.5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 25.50Â Â Â Â Â Â Â ...
16 9 ? 13.25 22.625 36.3125
...6Â Â Â Â Â Â Â Â Â Â Â Â Â 16Â Â Â Â Â Â Â Â Â Â 116Â Â Â Â Â Â Â Â 566Â Â Â Â Â Â Â Â 2272Â Â Â Â Â Â 6814
13       a  Â...
388, ?, 98, 49, 24, 15
