Math

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each "word" in a special code is a three digit number. if no word in the code can begin with a 1 or 0, what is the greatest number of different words the code can contain?

28
512
800
900
1000

  • Math -

    There are eight digits that can be in the first place, ten in each of the remaining two. Repetitions are allowed.

    The universal theory of counting says: multiply 8, 10, and 10 together to get the answer.

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