document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1206283>Question 1206283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, not sure how to tackle the working out for this question: I take a tablet every 10 days. If I take my first tablet on Monday and have 25 tablets, on what day will I take the last tablet. The answer my teacher gave is a Wednesday. Should I use modular arithmetic to solve, very stuck. Thank you.  </SPAN>\n" );
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document.write( "You get into trouble if you think in terms of the interval between tablets.<br><BR>\n" );
document.write( "You take a tablet every 10 days.  If you take the first tablet on the 1st of the month, then you will take your next tablets on the 11th and 21st.<br><BR>\n" );
document.write( "And taking the first tablet on Monday means you have 24 more tablets to take, not 25.<br><BR>\n" );
document.write( "So the last tablet will be taken 24*10 = 240 days after the first. 240 days divided by 7 days per week gives 34 weeks plus 2 days.  Since the first tablet was taken on a Monday, the last tablet will be taken on a Wednesday.<br><BR>\n" );
document.write( "The answer your teacher gave you is correct.<br><BR>\n" );
document.write( "ANSWER: Wednesday<br><BR>\n" );
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