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    Question

    If 2 is added to each odd digit and 1 is subtracted from

    each even digit in the number 7185634, what will be the sum of the digits which are second from the left end and second from the right end in the new number thus formed?
    A 12 Correct Answer Incorrect Answer
    B 6 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    Apply the rule to each digit of 7185634:

    7 → 9
    1 → 3
    8 → 7
    5 → 7
    6 → 5
    3 → 5
    4 → 3

    New number: 9377553

    Second from left = 3 ; second from right = 5 .
    Sum = 3 + 5 = 8 .

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