Aptitude - Compound Interest
- Compound Interest - Formulas
- Compound Interest - General Questions
- Compound Interest - Data Sufficiency 1
- Compound Interest - Data Sufficiency 2
- Compound Interest - Data Sufficiency 3.1
Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
What is the rate of interest p.c.p.a.? | |
I. | An amount doubles itself in 5 years on simple interest. |
II. | Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400. |
III. | Simple interest earned per annum is Rs. 2000. |
| I. | P x R x 5 | = P  R = 20. |
| 100 |
| II. P |  |
1 + | R |  |
2 | - P - | P x R x 2 | = 400 PR2 = 4000000. |
| 100 | 100 |
| III. | P x R x 1 | = 2000 PR = 200000. |
| 100 |
 |
PR2 | = | 4000000 | R = 20. |
| PR | 200000 |
Thus I only or (II and III) give answer.
Correct answer is (E).
What will be the compound interest earned on an amount of Rs. 5000 in 2 years? | |
I. | The simple interest on the same amount at the same rate of interest in 5 years is Rs. 2000. |
II. | The compound interest and the simple interest earned in one year is the same. |
III. | The amount becomed more than double on compound interest in 10 years. |
P = Rs. 5000 & T = 2 years.
I. S.I. on Rs. 5000 in 5 years is Rs. 2000.
| 5000 x R x 5 | = 2000 R = 8. |
|
| 100 |
Thus I only gives the answer.
Correct answer is (A).