document.write( "Question 252667: Not including the number one (1) which is always a common but not prime
\n" ); document.write( "factor, 54 and 81 have how many common factors?\r
\n" ); document.write( "\n" ); document.write( "A) 1 B) 2 C) 3 D) 4 E) 5\r
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Algebra.Com's Answer #184692 by richwmiller(17219)\"\" \"About 
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81 has 3*3*3*3
\n" ); document.write( "54 has 3*3*3*2
\n" ); document.write( "so they have the prime number 3 in common
\n" ); document.write( "but they also have 3,9,27 in common
\n" ); document.write( "so they have three common factors not including one
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