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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 ₹ 9900 to Y, then the cost price of the TV for X is :

₹ 9900

₹ 10000

₹ 11000

None of these

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

₹ 9040

₹ 8890

₹ 8920

₹ 8800

3. ₹ 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 :

₹ 8432

₹ 8520.20

₹ 8235

₹ 8353.80

4. The compound interest on ₹ 2800 for 1½ at 10% per annum is :

₹ 420

₹ 436.75

₹ 434

₹ 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 :

₹ 65650

₹ 6565

₹ 65065

₹ 6500