A gentleman buys every year Bank’s certificates of value exceeding the last year’s purchase by ₹25. After 20 years he finds that the value of the certificates purchased by him is ₹ 7250. Find the value of the certificates bought by him : in the 13th year.

A gentleman buys every year Bank’s certificates of value exceeding the last year’s purchase by ₹25. After 20 years he finds that the value of the certificates purchased by him is ₹ 7250. Find the value of the certificates bought by him : in the first year.

On 1st January every year, a person buys National saving certificates of value exceeding of his last year’s purchase by Rs. 100. After 10 years he finds that the total value of the certificates' purchased by him is $5000. Find the value of certificates purchased by him :- in the 9th year.

On 1st January every year, a person buys National saving certificates of value exceeding of his last year’s purchase by Rs. 100. After 10 years he finds that the total value of the certificates' purchased by him is $5000. Find the value of certificates purchased by him :-in the first year .

A manufacturer reckons that the value of a machine, which costs him Rs. 15625, will depreciate each year by 20%. Find the estimated value at the end of 5 years.

A TV was bought at a price of Rs 21,000. After one year the value of the TV was depreciated by 5% (Depreciation means reduction of value due to use and age of the item). Find the value of the TV after one year.

A machinerty worth Rs.10,500 depreciated by 5% .Find its value after one year.

In a bank, principal increases continuously at the rate of r% per year. Find the value of r if Rs 100 double itself in 10 years.

A manufacturer of PC’s produced 600 sets in the third year and 700 sets in the seventh year. Assuming that the production uniformly increases by a fixed number every year, find:- the production in the first year.