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    Question

    How many 100 digit positive numbers are there?

    A 9 ├Ч 10^99 Correct Answer Incorrect Answer
    B 9 ├Ч 10^100 Correct Answer Incorrect Answer
    C 10100 Correct Answer Incorrect Answer
    D 11 ├Ч 10^98 Correct Answer Incorrect Answer

    Solution

    The given number has 100 digits first digit can be any number other than 0 and so it has 9 values from 1 to 9 All the other 99 digits can be from 0 to 9 i.e 10 values therefore 9*10*10....99 times = ┬а 9 ├Ч 10 99

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