\r\n" );
document.write( "
 must be a positive integer, which means 
 must be a\r\n" );
document.write( " positive integer, so z must have factor 31.\r\n" );
document.write( "\r\n" );
document.write( "
 must be a positive integer, which means 
 must be a\r\n" );
document.write( " positive integer, so z must have factor 20.\r\n" );
document.write( "\r\n" );
document.write( "So the smallest integer that meets those two conditions is 31×20 or 620\r\n" );
document.write( "\r\n" );
document.write( "Now let's see if 620 meets the third condition\r\n" );
document.write( "\r\n" );
document.write( "
 or 
 must be a positive integer, and since\r\n" );
document.write( "\r\n" );
document.write( "
 = 4, 620 meets all 3 requirements so we know that 620 is the answer.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
  \n" );
document.write( "