Simple and Compound Interest

Suhani, an enterprising lady, took the loan from M/s Koramattam Finance against her gold ornaments at a simple interest of 12% per annum for 2 years. She, then, loaned 50% of the amount received from M/s Koramattam Finance to Vishamber at the rate of 16% per annum compounded half yearly for 2 years and the remaining amount to Kalawati at the rate of 12% per annum compounded annually for 2 years. What was the approximate percentage earning of Suhani at the end of 2 years?

Bank A offers 6% interest rate per annum compounded half yearly. Bank B and Bank C offer simple interest but the annual interest rate offered by Bank C is twice that of Bank B. Raju invests a certain amount in Bank B for a certain period and Rupa invests Rs. 10,000 in Bank C for twice that period. The interest that would accrue to Raju during that period is equal to the interest that would have accrued had he invested the same amount in Bank A for one year. The interest accrued, in INR, to Rupa is

Nitu has an initial capital of Rs. 20,000. Out of this, she invests Rs. 8,000 at 5.5% in bank A, Rs. 5,000 at 5.6% in bank B and the remaining amount at x% in bank C, each rate being simple interest per annum. Her combined annual interest income from these investments is equal to 5% of the initial capital. If she had invested her entire initial capital in bank C alone, then her annual interest income, in rupees, would have been

Amit invested a certain amount of money in two different schemes: Scheme A and Scheme B. Scheme A offered a simple interest rate of 8% per annum, while Scheme B offered a compound interest rate of 6% per annum. After two years, Amit found that the total interest earned from both schemes was Rs. 3,636. If the amount invested in Scheme A was Rs. 5,000 more than the amount invested in Scheme B, find the total amount invested in both the schemes.

Raj invests Rs. 60,000 in a scheme that offers 10% annual interest, compounded half-yearly, for 4 years. Rahul invests in the same scheme for 3 years, after which he reinvests the entire amount received for 1 additional year at 8% simple interest. If both Raj and Rahul receive the same amount at the end of the 4^th year, what was the initial amount invested by Rahul?

Jose had borrowed a certain amount of money from his friend at a simple interest rate of 10%. At the end of the first year, he repaid 30% of the principal amount. At the end of the second year, he repaid 50% of the remaining principal amount. At the end of the third year, he repaid Rs. 5,550 clearing the entire loan. Determine the principal amount he borrowed from his friend.

Sara has \$50,000 to invest. She decides to allocate a portion of it in a secure 4%-interest savings account, while the rest will be invested in a startup venture with her sibling, who pledges to return the investment with a 9% interest. The objective is to generate sufficient interest to contribute to a down payment for a home. What is the minimum amount Sara should invest in the startup venture to guarantee at least \$2,500 in interest?

Emily has decided to invest her monthly savings of $10,800 in two different types of assets. She allocates 30% of her savings to Asset A, which yields an annual return of 4%. She invests the remaining amount in Asset B, which offers an annual return of 7%. After one year, what is the total interest earned from both the investments?