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<html><table height="500" width="1000" border="2"><TR height="5" width="1000"><strong><center><h2>APTITUDE</h2></center></strong></TR><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="numbers.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="clocks.html"><b>BACK</b></a><h2 align="center"><b>CLOCKS</b></h2><br><br></u><br><u><b>General Concepts</b></u> :<font size="4"><br>The face or dial of a watch is a circle whose circumference is <br>divided into 60 equal parts,called minute spaces.<br> A clock has two hands, the Smaller one is called the hour hand <br>or short hand while the larger one is called the minute hand or long<br> hand.<br><u><bold><b>Important points</b></u> :<br></bold><br>a) In every 60 minutes, the minute hand gains 55 minutes on the hour hand<br><br>b)In every hour, both the hands coincide once ,i.e 0 degrees.<br><br>c)the hands are in the same straight line when they are coincident or<br> opposite to each other. i.e 0 degrees or 180 degrees.<br><br>d)when the two hands are at right angles, they are 15 minute spaces apart,i.e 90<br> degrees.<br>e)when the hands are in the opposite directions,they are 30 minute spaces apart,i.e<br> 180 degrees.<br><br>f)Angle traced by hour hand in 12hrs = 360 degrees.<br><br>g)Angle traced by minute hand in 60 min = 360 degrees.<br> If a watch or a clock indicated 8.15,when the correct time is 8,<br> it is said to be 15 minutes too fast. On the other hand ,<br> if it indicates 7.45,when the correct time is 8,it is said to be 15 minutes slow.<br><br>h)60 min --> 360 degrees<br> 1 min --> 60<br><br>i)the hands of a clock coincide in a day or 24 hours is 22 times ,in 12hours<br> 11minutes.<br><br>j)the hands of clock are straight in a day is 44 times .<br><br>k)the hands of a clock at right angle in a day is 44 times .<br><br>l)the hands of a clock in straight line but opposite in direction is 22 times per<br> day<br></bold></u></font><a href="clocks.html"><b>BACK</b></a></TD></TR></table></body></html>?? 快捷鍵說(shuō)明
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