document.write( "Question 1102395: How many numbers less than 9000 contain only 6, 7 or 8 as digits? \n" ); document.write( "

Algebra.Com's Answer #717086 by KMST(5328) $\"\"$ $\"About$

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All positive integer numbers of 1, 2, 3, or 4 digits made with only 6, 7, and 8 are less than 9000.
\n" ); document.write( "That includes $\"3\"$ 1-digit numbers: 6, 7, and 8,
\n" ); document.write( " $\"3%5E2=9\"$ 2-digit numbers: 66, 67, 68, 76,, 77, 78, .... ,
\n" ); document.write( " $\"3%5E3=27\"$ 3-digit numbers, and
\n" ); document.write( " $\"3%5E4=81\"$ 4-digit numbers.
\n" ); document.write( "The total is
\n" ); document.write( " $\"3%2B27%2B9%2B81=30%2B90=120\"$ . \n" ); document.write( "

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