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    Question

    Find the missing number in the givens series. 63,

    99, ?, 195, 255
    A 143 Correct Answer Incorrect Answer
    B 138 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 135 Correct Answer Incorrect Answer

    Solution

    8² – 1 = 64 – 1 = 63 10² – 1 = 100 – 1 = 99 12² – 1 = 144 – 1 = 143 14² – 1 = 196 – 1 = 195 16² – 1 = 256 – 1 = 255

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