Question

    Directions (Q.51 - 55): What should come in place of the question mark (?) in the following number series?

    4 12 ? 144 544 2112

    A 22 Correct Answer Incorrect Answer
    B 40 Correct Answer Incorrect Answer
    C 33 Correct Answer Incorrect Answer
    D 25 Correct Answer Incorrect Answer
    E 15 Correct Answer Incorrect Answer

    Solution

    (4 – 1) × 2² = 12 (12 –2) × 2² = 40 (40 – 4) × 2² = 144 (144 – 8) × 2² = 544 (544 – 16) × 2² = 2112

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