document.write( "Question 503687: Three runners each have a single digit number on their shirts; 1, 3 and 6. Arrange them in a row to form a three digit number that is divisible by 7. \n" ); document.write( "
Algebra.Com's Answer #339412 by Edwin McCravy(20055)\"\" \"About 
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document.write( "You can't, if they stand upright, because these six are the \r\n" );
document.write( "only possaibilities:\r\n" );
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document.write( "136 = 2×2×17, not divisible by 7\r\n" );
document.write( "163 = a prime number, not divisible by 7\r\n" );
document.write( "316 = 2×2×79, not divisible by 7\r\n" );
document.write( "361 = 19×19, not divisible by 7\r\n" );
document.write( "613 = a prime number, not divisible by 7\r\n" );
document.write( "631 = a prime number, not divisible by 7.\r\n" );
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document.write( "However if the runner with the 6 stands on his or her head,\r\n" );
document.write( "you'll have  931 which is divisible by 7 since 7×133=931.\r\n" );
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document.write( "Edwin
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