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Odd Man Out and Series

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  1. Find out the wrong number in the series 5, 15, 30, 135, 405, 1215, 3645 ?
    1. 3645
    2. 1215
    3. 405
    4. 30
Correct Option: D

Multiply each term by 3 to obtain the next term. Hence, 30 is a wrong number.


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