document.write( "Question 365041: How many 10 digit numbers can be formed using 3 and 7 only? \n" ); document.write( "
Algebra.Com's Answer #260285 by Alan3354(69443)\"\" \"About 
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Each digit is 1 or 2 numbers.
\n" ); document.write( "--> 2^10 = 1024
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