Multiple Choice Questions on How many terms are in the G P 3 6 12 24 384 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

How many terms are in the G P 3 6 12 24 384 ........

Quantitative Aptitude ( CCS) Arithmetic progression
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    How many terms are in the G.P. 3, 6, 12, 24, ......., 384 ?

    8

    Correct Answer

    9

    Incorrect Answer

    10

    Incorrect Answer

    11

    Incorrect Answer
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    Explanation:

    Here a = 3 and r = 6/3 = 2. Let the number of terms be n.
    Then, t = 384 => a * r^(n-1) = 384
    => 3 * 2^(n-1) = 384 => 2^(n-1) = 128 = 2^(7)

    => n-1 = 7 => n = 8.

    Hence, option 1 is the correct answer.

    By: Amit Kumar
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