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<html><table height="500" width="1000" border="2"><TR height="5" width="1000"><strong><center><marquee><font color="Green"><h1>APTITUDE</h1></center></strong></font></TR></marquee><TR><TD align="left" width="200" valign="top"><table><TR><a href="numbers.html"><strong>Numbers</strong></a></TR><br><TR><a href="hcf.html"><strong>H.C.F and L.C.M</strong></a></TR><br><TR><a href="dec.html" ><strong>Decimal Fractions</strong></a></TR><br><TR><a href="simplification.html"><strong>Simplification</strong></a></TR><br><TR><a href="squareandcuberoot.html" ><strong>Square and Cube roots</strong></a></TR><br><TR><a href="average.html" ><strong>Average</strong></a></TR><br><TR><a href="pnumbers.html" ><strong>Problems on Numbers</strong></a></TR><br><TR><a href="problemsonages.html"><strong>Problems on Ages</strong></a></TR><br><TR><a href="surdsandindices.html"><strong>Surds and Indices</strong></a></TR><br><TR><a href="percent.html" ><strong>Percentage</strong></a></TR><br><TR><a href="profitandloss.html" ><strong>Profit and Loss</strong></a></TR><br><TR><a href="ratioandproportion.html" ><strong>Ratio And Proportions</strong></a></TR><br><TR><a href="partnership.html"><strong>Partnership</strong></a></TR><br><TR><a href="chainrule1.html"><strong>Chain Rule</strong></a></TR><br><TR><a href="timeandwork.html" ><strong>Time and Work</strong></a></TR><br><TR><a href="pipesandcisterns.html" ><strong>Pipes and Cisterns</strong></a></TR><br><TR><a href="timeanddistance.html"><strong>Time and Distance</strong></a></TR><br><TR><a href="trains.html" ><strong>Trains</strong></a></TR><br><TR><a href="boats.html"><strong>Boats and Streams</strong></a></TR><br><TR><a href="alligation.html"><strong>Alligation or Mixture </strong></a></TR><br><TR><a href="simple.html" ><strong>Simple Interest</strong></a></TR><br><TR><a href="CI.html"><strong>Compound Interest</strong></a></TR><br><TR><a href=""><strong>Logorithms</strong></a></TR><br><TR><a href="areas.html" ><strong>Areas</strong></a></TR><br><TR><a href="volume.html"><strong>Volume and Surface area</strong></a></TR><br><TR><a href="races.html" ><strong>Races and Games of Skill</strong></a></TR><br><TR><a href="calendar.html" ><strong>Calendar</strong></a></TR><br><TR><a href="clocks.html" ><strong>Clocks</strong></a></TR><br><TR><a href="" ><strong>Stocks ans Shares</strong></a></TR><br><TR><a href="true.html" ><strong>True Discount</strong></a></TR><br><TR><a href="banker1.html" ><strong>Bankers Discount</strong></a></TR><br><TR><a href="oddseries.html"><strong>Oddmanout and Series</strong></a></TR><br><TR><a href=""><strong>Data Interpretation</strong></a></TR><br><TR><a href="probability.html"><strong>probability</strong></a></TR><br><TR><a href="percom1.html" ><strong>Permutations and Combinations</strong></a></TR><br><TR><a href="pinkivijji_puzzles.html" ><strong>Puzzles</strong></a></TR></table></TD><TD valign="top"><a href="calendar.html" target="right"><strong>BACK</strong></a><br><br><FONT size="4"><center><bold><u><h3>Calendar</h3></u></bold></center><br><br><bold><u>Main concepts :</u></bold><br><bold><br>a) Odd Days : The number of days more than the complete number of weeks in a given period is number of odd days during that period.<br><br> b) Leap year : Every year which is divisible by 4 is called a leap year. Thus each one of he year 1992,1996,2004,2008,2012,,etc, is a eap year.<br> Every 4th century is a leap year but no other century is a leap year thus each one of 400,800,1200,1600,2000,etc is a leap year. None of the 1900,2010,2020,2100,etc is a leap year. An year which is not a leap year is called Ordinary year.<br><br>c)An ordinary year has 365 days. <br><br> d) A leap year has 366 days.<br><br>e)<u>Counting of odd days</u> :<br><br>i)1 ordinary year = 365 days =52 weeks+1 day,Therefore An ordinary year has 1 Odd day.<br>ii)One leap year = 366 days =52 weeks+2 days, Therefore a leap year has 2 Odd days.<br>iii) 100 years = 76 ordinary years+ 24 leap years <br> = [(76*52) weeks+76 days]+[(24*52)weeks+48 days] <br> = 5200 weeks+124days=[5217 weeks+5 days] <br> therefore 100 years contain 5 odd days<br>iv)200 years contain 10(1week+3days), i.e 3 odd days<br>v)300 years contain 15(2 weeks+1 day), i.e 1 odd day<br>vi)400 years contain (20+1), i.e 3 weeks,so 0 Odd days<br>similarly each one of 800,1200,1600,2000,etc contains o odd days. <br><br> Note: (7n+m) odd days , where m less than or equal to 7 is equivalent to m odd days ,thus ,8 odd days = 1 odd day etc.</bold><br><br><bold>f)<u> Some codes o remember the months and weeks</u>:<br> <br>a) <u>Week</u><br> <br> Sunday - 1 <br> Monday - 2 <br> Tuesday - 3 <br> Wednesday - 4 <br> Thursday - 5 <br> Friday - 6 <br> Saturday - 0<br> <br> b) <u>Month</u> <br> <br>jan - 1 july - 0 <br>feb - 4 Aug - 3 <br>Mar - 4 Sep - 6 <br>Apr - 0 Oct - 1 <br>May - 2 Nov - 4 <br>june - 5 Dec - 6</bold><br><br></FONT><a href="calendar.html" target="right"><strong>BACK</strong></a><br><br></TD></TR></table></body></html>?? 快捷鍵說明
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