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1. X sells a TV to Y at the gain of 10% and again Y sells it to Z at a loss of 10%. If Z pays Rs 9900 to Y, then the cost price of the TV for X is :

9800

10000

12000

None of these

2. A sum of money becomes Rs 13,380 after 3 years and Rs 20,070 after 6 years on compound interest. The sum is :

9030

8790

8920

8800

3. Rs 7500 is borrowed at compound interest at the rate of 2% for the first year, 4% for the second year and 5% for the third year. The amount paid after 3 years will be :

8532

8520.20

8335

8353.80

4. The compound interest on Rs 2800 for at 10% per annum is :

520

426.75

444

441.35

5.. The difference between simple and compound interest (compounded annually) on a sum of money for 2 years at 10% per annum is R. 65. The sum is :

6550

6665

64065

6500