document.write( "Question 689037: URGENT HELP!!!!!!
\n" ); document.write( "i am having trouble solving this problem help\r
\n" ); document.write( "\n" ); document.write( "If a clock were turned into a twenty four hour clock so that it struck 24 times at midnight, how many times would it strike in the course of a 24 hour day? \n" ); document.write( "
Algebra.Com's Answer #425792 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "I'll assume that the day starts at the beginning of the 1st\r\n" );
document.write( "stroke of 24 at midnight, and is over just before it starts \r\n" );
document.write( "to strike 24 the second time.  So I will only count the strike\r\n" );
document.write( "of 24 just once, and not count the striking of 24 at the end. \r\n" );
document.write( "\r\n" );
document.write( "S24 = 24+1+2+3+...20+21+22+23\r\n" );
document.write( "\r\n" );
document.write( "We may as well move the 24 from the left end to the right end. \r\n" );
document.write( "\r\n" );
document.write( "S24 = 1+2+3...20+21+22+23+24\r\n" );
document.write( "\r\n" );
document.write( "Sn = \"n%2F2\"(a1 + an) \r\n" );
document.write( "\r\n" );
document.write( "n = 24, a1 = 1, an = a24 = 24. \r\n" );
document.write( "\r\n" );
document.write( "S24 = \"24%2F2\"(1 + 24)\r\n" );
document.write( "\r\n" );
document.write( "S24 = 12×25 = 300 times.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );