Profit and Loss...

A certain sum of money lent on simple interest doubles itself in 10 years. In how many years will it triple itself?

Find the minimum number of years for which simple interest must be reckoned at 5% p.a. on Rs. 512.50 so that the interest may be an exact number in rupees.

John borrowed Rs. 3000 from Mohan at a rate of 10% p.a simple interest for 3 years. At the end of the year, he paid the interest for that year and part of the loan, altogether Rs. 800. Similarly, he paid Rs. 800 at the end of the 2^nd year. What sum must he pay now to clear off the debt?

Seema lent a certain sum of money at 12%; and in 7 years, the interest amounted to Rs. 800 less than the sum lent. What was the sum lent?

Two equal sums of money were invested at simple interest, one at 3% and the other at 3.5%. At the end of 3 years, the interest received from the latter investment exceeded that received from the former investment by Rs. 120. Find the sum invested.

Sudhir has Rs. 7000. He lends Rs. 3000 at 5% and Rs. 2000 at 6%. At what rate must he lend the remainder of his money so that his total income may be 8% on Rs. 7000? (Duration of all the lending is 1 year.)

What annual payment will discharge a debt of Rs. 4910 due in 5 years, the rate of interest being 9% per annum?

A man borrows Rs. 3000 at 6% per annum from B. Each year, he pays Rs. 400 for interest and part payment of the debt. What amount does A owe at the end of 3 years?

A and B borrow a total sum of Rs. 30000 from C at 4% p.a. for 5 years and 5% for 4 years, respectively. Find out the sum borrowed by A, if A's interest is double than that of B's interest.

Divide Rs. 30,000 into the two sums such that if the first be put out at S.I. for 5 years at p.c; and the second for 4 years at 5%, Interest of the first sum shall be double that of the second. If first part be x & other is y, then find the value of y.

A machinery depreciates in cost every year at the rate of 5% of its value in the beginning of that year. Find out its original value if at the end of 3 years, its depreciated value is Rs. 205770

A certain sum of money at certain rate of interest amounts to Rs. 5900 in 3 years and Rs. 7400 in 8 years, it will amount to Rs. 8000 at the same rate of interest in

Sahil borrows Rs. 16550 from Rishab to be paid back with compound interest at the rate of 10% p.a. in 3 years, in 3 equal yearly instalments. Find the value of each instalment.

A man borrows money at 6% per annum interest payable yearly and lends it immediately at 6% per annum compound interest payable half-yearly and thereby gains Rs. 45 at the end of the year. What is the sum borrowed?

The compound interest on a certain sum for 3 years at the rate of 5% per annum is Rs. 2522. The simple interest on the same sum for double the time at half the rate percent per annum is:

There is 60% increase in an amount in 6 years at SI. What will be CI of Rs. 12000 after 3 years at the same rate?

A sum of money was borrowed and paid back in two annual equal installments of Rs. 882 each, paying 5% compound interest. The sum borrowed was

The least number of complete years in which a sum of money put at 25% C.I. will be more than treble is:

The effective annual rate of interest corresponding to a nominal rate of 8% per annum payable quarterly is

A sum of money invested at compound interest amounts to Rs. 4624 in two years and Rs. 4913 in three years. The sum invested is