A certain sum of money yields Rs. 3,310 as compound interest for 3 years at 10% per annum. The sum is (in rupees).

- Rs. 25200 is invested in 3 parts in such a way that Simple Interest on 1
^{st}Part at 4% per annum for 3 years, Simple Interest on 2^{nd}part at 6% per annum for 4 years and Simple Interest on 3^{rd}Part at 8% per annum for 5 years are equal. Find each part. - A took a loan of Rs.5680 at simple interest of 30% p.a. and invested the same money in a scheme at simple interest of 40% p.a. Find the profit earned by A at the end of 2 years.
- Rs.700 amounts to Rs.742 in 2 years at a certain rate. If interest rate is increased by 2%, then what will be the new interest?
- What sum of money will become Rs.1352 in 2 years at 4 percent per annum compound interest?
- Mr. Mathur invested Rs. 40,000 with Bank A for 2 years and Rs. 10,000 with Bank B for 4 years at simple interest and earned Rs. 6,000 as interest. Find the interest rate p.a. if both the banks lend money at the same rate of interest.
- A bank pays simple interest at 4% per annum on the first Rs.5500 and an interest of 6% for amounts above that. Find the interest earned by Sameera if she deposits Rs.13,250 with the bank for 2 years.
- Vedant borrows Rs.75,000 for 2 yrs at 3% p.a simple interest. He immediately lends it to Abhishek at 5.5% p.a. for 2 yrs at simple interest. How much Vedant gained in the transaction?
- A person invested some amount at the rate of 12% simple interest and a certain amount at the rate of 10% simple interest. He received yearly interest of Rs 140. But if he had interchanged the amounts invested, he would have received Rs 6 more as interest. How much did he invested at 10% simple interest initially?
- A certain sum of money will be doubled in 80 years at the rate of simple interest percent per annum is:
- A sum of money lent at compound interest at the rate of 10% per annum is paid back in three equal instalments of Rs 3,993. Find the sum?

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