A person invests money in three different schemes for 6 years, 10 years and 12 years at 10%, 12% and 15% simple interest respectively. At the completion of each scheme, he gets the same interest. The ratio of his investments is-

The annual payment of Rs.1000 in  5 years at 4% per annum simple interest will discharge a debt of

A person invested a sum of Rs. 18,600 at x% per year and another sum that is twice the former at (x+2)% per year, both at simple interest. If the total interest earned on both investments for $$ {3{1\over 2}}$$ years is Rs.23,110.50, then the rate of  interest per year on the second investment is:

What is the simple interest when Rs. 13000 get the interest Rs. 6,370 in the $$ {3{1\over 2}}$$ year?

If an amount doubles automatically in 8 years, then what is the interest rate?

A principal increase by 50 percent in five years at the rate of simple interest. What will be the compound interest for 3 years at Rs 20,000 with the same interest rate?

The simple interest on an amount at the rate of 7 percent for five years is Rs 700. So how much is the principal?

The simple interest for four years is one fourth of the principal. At the same rate, which amount become Rs.450 total amount in 2 years?