The difference between the simple and the compound interest compounded every six months at the rate of 10% p.a. at the end of two years is 124.05. What is the sum? Options:	A) 10,000	B) 6,000	C) 12,000	D) 8,000	E) None of these
Let the sum be x.   Then, [x(1+5/100)4−x]−[x×10×2/100]=124.05   Solving the above eqns, we get x = 8,000.   Answer 8,000
<result>D</result>
The difference between the simple and the compound interest compounded every six months at the rate of 10% p.a. at the end of two years is 124.05. What is the sum?