A man starts repaying a loan as first instalment of Rs. 100. If he increases the instalment by Rs 5 every month, what amount he will pay in the 30th instalment?

A man borrows $ 1,000 and agrees to repay with a total interest of $ 140 in 12 instalments, each instalment being less than the preceding by $ 10. What should be his first instalment ?

Shamshad Ali buys a scooterfor Rs 22000. He pays Rs 4000 cash and agreesto pay the balance in annual instalment of Rs 1 000 plus 10% interest on the unpaid amount. How much will the scooter cost him?

A farmer buys a used tractor for Rs 12000. He pays Rs 6000 cash and agreesto pay the balance in annual instalments of Rs 500 plus 12% interest on the unpaid amount. How much will the tractor cost him?

A T.V. can be purchased for Rs 24000 cash or for Rs 8000 cashdown payment and six monthly instalments of Rs 2800 each. Ali goes to market to buy TV under instalment scheme or to make cash payment by taking loan from some finanancial society. The society charges simple interest at the rate of 18% per annum simple interest. Which option is better for Ali?

The price of a TV is Rs 13,000. The sales tax charged on it is at the rate of 12%. Find the amount that Vinod will have to pay if he buys it.

Aman arranges to pay a debt of $90000 in 40 monthly instalments which are in A.P. when 30 instalments are paid, he dies leaving one third of the debt unpaid. Find the value of the first three instalments.