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    Question

    How many such pairs of digits are there in the number

    '62158943' each of which has as many digits between them in the number both forward and backward direction as they have between them in the number system ?
    A 3 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 1 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E More than 4 Correct Answer Incorrect Answer

    Solution

    Forward тАУ 89 Backward тАУ 34, 12

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