Question
On what sum of money will the difference between the
simple interest and compound interest (Compounded annually) for 3 years at 5% per annum be ₹15.25?Solution
Let the sum =1000 Rate =5% and Time = 3 years. CI-SI=15.25. If 1000×5/100=50. and 50×5/100=2.5 2.5×5/100=0.125. Now- 
CI-SI =7.625 ATQ- 7.625=15.25 1=2 Then 1000=2×1000=2000 Rs.
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