Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - General Questions (Q.No. 2)
2.
The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 1. The sum (in Rs.) is:
Answer: Option
Explanation:
Let the sum be Rs. x. Then,
| C.I. = |  |
x |  |
1 + | 4 |  |
2 | - x |  |
= | |
676 | x | - x | |
= | 51 | x. |
| 100 | 625 | 625 |
| S.I. = | |
x x 4 x 2 | |
= | 2x | . |
| 100 | 25 |
 |
51x | - | 2x | = 1 |
| 625 | 25 |
x = 625.
Discussion:
149 comments Page 4 of 15.
Pratik patel said:
1 decade ago
But. It is for only two years. I think. Not for 4;5;6 years. Try it. @Chetan.
Subhani said:
1 decade ago
Difference D = P(R*R)/10000.
Siva nandi reddy said:
1 decade ago
For 3 years p=(d*100*100*100)/(r*r(r+300)).
Amit kumar said:
1 decade ago
Sum = difference(100/rate)^t (here t=2yrs).
Sum = 1(100/4)^2 = 625.
Sum = 1(100/4)^2 = 625.
Tarakeswararao said:
1 decade ago
Hello friend this is Tarak.
Now we have formula for finding this type of problems.
i.e D = P*(R/100)^2 if the time is 2 years.
If time is 3 years now the formula is D = P*(R/100)^2*(3+(R/100)).
Where D = Difference.
P = Principle amount.
R = Interest.
Now we have formula for finding this type of problems.
i.e D = P*(R/100)^2 if the time is 2 years.
If time is 3 years now the formula is D = P*(R/100)^2*(3+(R/100)).
Where D = Difference.
P = Principle amount.
R = Interest.
An aspirant said:
1 decade ago
Sum = Difference*(100) square/(r)square.
Prabhjot Singh said:
1 decade ago
Just equate:
CI-SI = P(R/100)(R/100) for 2 years.
CI-SI = P(R/100)(R/100)(300+R/100) for 3 years.
By these formula's it is easier to calculate the result.
CI-SI = P(R/100)(R/100) for 2 years.
CI-SI = P(R/100)(R/100)(300+R/100) for 3 years.
By these formula's it is easier to calculate the result.
Raja said:
1 decade ago
What is the shortcut formula to find differences of ci and si for 4 years and 5 years?
Siva said:
1 decade ago
Difference between 2 years = pr^2/100^2.
Ganga said:
1 decade ago
@Pankaj parashar.
Please tell me how CI rate for 2 years = 8.16%.
Please help me.
Please tell me how CI rate for 2 years = 8.16%.
Please help me.
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