document.write( "Question 896744: How many diffeent 7 digits telephone numbers are possible if the first digit cannot be zero and no digit may repeat? \n" ); document.write( "
Algebra.Com's Answer #543938 by stanbon(75887)\"\" \"About 
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How many diffeent 7 digits telephone numbers are possible if the first digit cannot be zero and no digit may repeat?
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\n" ); document.write( "Ans: 9*9*8*7*6*5*4 = 544320
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