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A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. 18, 28, 60, ?, 493

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A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

18, 28, 60, ?, 493
1). 160
2). 159
3). 144
4). None of these


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2 vote
Answered by on | Votes 2 |

The relation among given numbers are:

18 × 1.5 + 12 = 27 + 1 = 28;

28 × 2 + 22 = 56 + 4 = 60;

60 × 2.5 + 32 = 150 + 9 = 159;

159 × 3 + 42 = 477 + 16 = 493

Hence, “159” is the missing term.

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