Question
Sri Gupta borrowed a sum at compound interest. What is
the amount returned in 2 years ? I. The simple interest incurred on the sum in 1 year is 1200. II. The borrowed sum is ten times the amount earned at simple interest in two years. III. The rate of interest is 10% per annum.Solution
From I. R = 5% per annum From II. SI for 1 year = 1200 SI for 2 years = 1200 × 2 = 2400 From III. P = 10 × SI = 10 × 2400 = 24000 Now, from I and II, we get `(SI xx 100)/(P xx T)` = `((2400 xx 100)/(24000 xx 2))` = 5% Therefore amount = P `(1+5/100)` = 24000 `xx` 1.05 `xx` 1.05
2, 12, 36, 80, ?, 252
52 25 27 ? 208 1648
...86 36 ? 7 7.5 0.75
12Â Â Â Â Â Â Â Â Â Â 156Â Â Â Â Â Â Â Â 256Â Â Â Â Â Â Â Â 320Â Â Â Â Â Â Â Â 356Â Â Â Â Â Â Â Â ?
...3 12 48 192 768 ?
21, 63, 315, ?, 19845, 218295
4 5 12 39 160 ?
...21Â Â Â Â Â Â Â Â Â Â 48Â Â Â Â Â Â Â Â Â Â 173Â Â Â Â Â Â Â Â 516Â Â Â Â Â Â Â Â 1245Â Â Â Â Â Â 2576Â Â Â Â Â Â ?
...What should come in place of the question mark (?) in the following number series?  Â
 58   30    29     �...
Select the number from among the given options that can replace the question mark (?) in the following series.
8, 27, 64, 125, 216, ?
