Question
Rs. 12000 invested for 2 years in a scheme offering
compound interest (compounded annually) of 15% p.a. gives an interest that is Rs. 20 less than the interest received on investing Rs. Y for a year at simple interest of 20% p.a.. Find the value of ‘Y’.Solution
Interest returned on investing Rs. 12000 = 12000(1 + 15/100)2 – 12000 = 12000(115/100)2 – 12000 = 12000(23/20)2 – 12000 = 12000{232/202)- 1} = 12000{529/400)- 1} = 12000(529 - 400)/400 = Rs. 3870 So, interest returned on investing Rs. Y for 1 year at simple interest of 20% p.a. = 3870 + 20 = Rs. 3890 Or, Y × (20/100) = 3890 Or, Y = 3890 × (100/20) Or, Y = 19450
138, 140, 152, 174, ?, 248
9 28 83 250 ? 2248
What will come in place of (?) question mark in the given number series.
16, 24, 51, 115, 240, ?
14, 15, 24, 49, 98, 179, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 24424  12  18  ?  157.5  708.75  3,898.125
Which of the following number will replace the question mark (?) and complete the given number series?
4, 5, 12, 39, 160, ?
71, 79, 88, 152, ?, 393
43          86          258        ?             5160                     30960
...188    178    158   ?     88    38
