The difference between the amounts of compound interest and simple interest on the same amount invested at the same rate for 2 years in Rs. 32. If the interest rate is 4% per annum, calculate the amount invested.(in Rs.)

The simple interest as a sum of money is $\frac{4}{5}$ of the principal. Find the rate of interest if both the rate of interest and time are numerically equal.

A sum of money at compound interest double itself in 12 years. It will become 16 times of itself in:

What is the rate of simple interest for the last 5 years if the sum of ₹ 480 becomes ₹ 792 in 11 years and the rate of interest for the first 6 years is 5%?

Consider the simple interest of the following

(A) A sum of Rs 200 at 6% per annum for 5 yr.

(B) A sum of Rs 2000 at $13\frac{1}{2}$% per annum for 4 yr.

(C) A sum of Rs 2600 at 4% per annum for 5 yr.

(D) A sum of Rs 68000 at $16\frac{2}{3}$% per annum for 9 months.

Arrange the above in descending order.

Choose the correct answer from the options given below:

A sum is invested at 10 % per annum with simple interest. What will be the time taken to increase its value by 25% ?

If the difference between the compound and simple interest on a certain sum of money for 3 years at 5% per annum is ₹15.25, then find the sum.