document.write( "Question 938361: Please help me solve this( To me, Complicated question) ! Your detailed explanation are very much appreciated! :D :
\n" ); document.write( "Given that 441=3^2x7^2 and 1005=3x5x67, Find the smallest possible whole number K for which
\n" ); document.write( "A) 1005k x 441 is a perfect square
\n" ); document.write( "B) 1005 X 441K is a perfect cube\r
\n" ); document.write( "\n" ); document.write( "My working:
\n" ); document.write( "a) (3 x 5 x 67)k x (3^2x7^2) = (3x3 ^2x7^2x5x67)k
\n" ); document.write( " =(3^3 x 7^2x5x67) k\r
\n" ); document.write( "\n" ); document.write( "And then I'm stuck...... Please hhelp as soon as possible!! Keep on thinking hard but still cant solve D:\r
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Algebra.Com's Answer #571630 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"1005k%2A441=3%2A5%2A67%2Ak%2A3%5E2%2A7%5E2=3%5E3%2A5%2A67%2Ak\"
\n" ); document.write( "For it to be a perfect square, all the factors need to have a exponent that is a multiple of 2.
\n" ); document.write( "\"k=3%2A5%2A67\"
\n" ); document.write( "\"k=1005\"
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\n" ); document.write( "For the factors to be cubed, the exponents must be multiples of 3.
\n" ); document.write( "\"1005k%2A441=3%2A5%2A67%2Ak%2A3%5E2%2A7%5E2=3%5E3%2A5%2A7%5E2%2A67%2Ak\"
\n" ); document.write( "3 is already a multiple.
\n" ); document.write( "5 needs \"5%5E2\"
\n" ); document.write( "7 needs \"7\"
\n" ); document.write( "67 needs \"67%5E2\"
\n" ); document.write( "\"k=5%5E2%2A7%2A67%5E2\"
\n" ); document.write( "\"k=785575\"\r
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