Without using formula, find the annual compound interest on: 

1. Rs 10000 at 10$\%$ for 2 years
2. Rs 8000 at 8$\%$ for 3 years
3. Rs 12000 at 5$\%$ for 3 years
4. Rs 15000 at 4$\%$ for 2 years

Using the formula, find the annual compound interest on:

1. Rs 3000 at 10$\%$ for 2 years
2. Rs 4000 at 10$\%$ for 3 years
3. Rs 5000 at 10$\%$ for 3 years
4. Rs 6000 at 10$\%$ for 2 years

Find the semi-annual compound interest of the following:

1. Rs 10000 at 10$\%$ for 2 years
2. Rs 40000 at 12$\%$ for 2 years
3. Rs 50000 at 15$\%$ for $1\frac {1}{2}$ years
4. Rs 20000 at 8$\%$ for $1\frac {1}{2}$ years

Find the Semi-annual compound interest of amount Rs 80,000 at 10$\rm \%$ for 1 year.

Find the Semi-annual compound interest of Rs 10,000 at 14$\rm \%$ for 1 year.

Find the Semi-annual compound interest of amount Rs 75,000 at 15$\rm \%$ for $1\rm \frac {1}{2}$ years.

Find the Semi-annual compound interest of amount Rs 90,000 at 8$\rm \%$ for $1\rm \frac {1}{2}$ years.

Find the quarterly compound interest of Rs 25,000 at 10$\rm \%$ for 1 year.

Find the quarterly compound interest of Rs 30,000 at 10$\rm \%$ for 9 months.

Find the quarterly compound interest of Rs 40,000 at 8$\rm \%$ for 6 months.

Find the quarterly compound interest of Rs 60,000 at 12$\rm \%$ for 12 months.

Find the quarterly compound interest of Rs 16,000 at 10$\rm \%$ for 6 months.

Find the quarterly compound interest of Rs 24,000 at 10$\rm \%$ for 9 months.

Find the quarterly compound interest of Rs 40,000 at 12$\rm \%$ for 1 year.

Find the quarterly compound interest of Rs 50,000 at 15$\rm \%$ for 12 months.

Samundra deposits Rs 850 at NBL at the half-yearly rate of 8$\%$ compound interest for 1 year.

1. How much interest will he get?
2. Find the annual compound interest for the same time.

Sagar deposits Rs 5000 for $1\frac {1}{2}$ years at the annual rate of 10$\rm \%$ in a bank

1. Find the semi-annual compound interest.
2. Find the semi-annual compound amount.

Jharana got Rs 1881 interest of certain sum for 2 years at 9$\rm \%$ compounded yearly.

1. Find the sum.
2. Find the compound amount after 2 years.

The annual compound amount of a sum of money for 2 years at 5$\rm \%$ is Rs 1323.

1. What is the borrowed sum?
2. Find the annual compound interest of 2 years.

At what time the annual compound amount of Rs 60000 at 10$\rm \%$ rate is Rs 79860?

Mrs. Sumina wants to invest Rs. 200,000 in a bank for three years. Which of the following plans should she choose tp maximize her return?