Question
The difference between the compound interest, compounded
annually and simple interest on Rs. ‘P’ at the rate of 25% p.a. for 2 years, is Rs. 150. If Rs. (P + 1600) is invested at the same rate p.a., then find the compound interest, compounded annually earned after 3 years.Solution
Using formula Difference = Sum(R/100)2 Or, 150 = P(25/100)2 Or, 150 = P(625/10000) Or, 0.0625P = 150 Or, P = 2400 Sum that is invested on compound interest = 2400 + 1600 = Rs. 4000 Compound interest = 4000(1 + 25/100)3 – 4000 = 4000 × (5/4) × (5/4) × (5/4) – 4000 = 7812.5 – 4000 = Rs. 3812.5
463, 430, 369, 310, 243, 168
7, -26, -45, -60, -69, -73
216, 432, 144, 288, 96, 191, 64
88, 112, 78, 120, 64, 136
Find the wrong number in the series.
5, 12, 23, 38, 57, 80, 107Find the wrong number in the given number series.
1, 2, 6, 24, 119, 720
1080, 1058, 1016, 934, 772, 440
32, 46, 88, 158, 256, 380
768Â Â Â 2304Â Â Â 288Â Â Â 864Â Â Â 106Â Â Â 324
153, 154, 310, 913, 3736, 18685