999-111=888
888 3 digit numbers can be made with numbers between 1 - 9
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The pages of a book are numbered from 1 to 128. How many page numbers contain the digit 6?
5! = 5 x 4 x 3 x 2 x 1 = 120
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There are 3 values (1, 2, 3) for each of the 4 digits. Therefore, there are 3*3*3*3 or 81 four digit numbers that can be formed.
50 to the 5th power.156,250 combination.