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01.  The difference between compound interest and simple interest on an amount of Rs. 15,000 for 2 years is Rs. 96. What is the rate of interest per annum?  

02.  The effective annual rate of interest corresponding to a nominal rate of 6% per annum payable halfyearly is:  

03.  If the difference ^{between }simple interest and compound interest on a certain for 2 years at 5% is Rs. 250, then find the sum  

04.  In what time will Rs. 1000 amount to Rs. 1331 at 10% per annum, under compound interest?  

05.  If the composed interest on a certain sum for 2 years at 12.5% per annum is Rs. 170 then find the sum.  

06.  The value of a refrigerator that was purchased 2 years ago, depreciates at 12% per annum. If its present value is Rs. 9680, how much was it purchased  

07.  Find the compound interest on Rs. 16000 at 10% per annum at the end of 1 Â½ years, if the interest is calculated half yearly.  

08.  A person borrowed Rs. 10000 at 10% rate of compound interest. He repaid certain amount at the end of the first year. Then he paid Rs. 5500 at the end of the second year thereby discharging the loan completely. What amount did he repay at the end of the first year?  

09.  Find the compound interest on Rs. 2000 at 5% per annum payable half yearly for 1 Â½ years?  

10.  The bacteria in a culture grow by 5% in the first hour, get destroyed by 5% in the second hour and again grow b 5% in the third hour. If the count of the bacteria at the end of the third hour is 8.379 * 108 , find the original count of bacteria in the sample.  

11.  138.009 + 341.981 â€“ 146.305 = 123.6 + ?  
