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    Question

    Select the number from among the given options that can

    replace the question mark ‘?’ in the following series. 19, 23, 31, 47, ‘?’, 143
    A 75 Correct Answer Incorrect Answer
    B 76 Correct Answer Incorrect Answer
    C 78 Correct Answer Incorrect Answer
    D 79 Correct Answer Incorrect Answer

    Solution

    19 + 4 = 23 23 + 8 = 31 31 + 16 = 47 47 + 32 = 79 79 + 64 = 143

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