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    Question

    2187, 1458, 972, ?, 432,

    288 What should come in place of question mark (?) in the following number series?
    A 578 Correct Answer Incorrect Answer
    B 506 Correct Answer Incorrect Answer
    C 668 Correct Answer Incorrect Answer
    D 648 Correct Answer Incorrect Answer
    E 768 Correct Answer Incorrect Answer

    Solution

    2187 2187 × 2/3 = 1458 1458 × 2/3 = 972 972 × 2/3 = 648 648 × 2/3 = 432 432 × 2/3 = 288

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