A bank offers 15 % compound interest per half-year. A customer deposits Rs 2400 each on 1 January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is –

One certain Principal if the Simple interest for two years is Rs 2400 and Compound interest for the two years is Rs 2544, what is the rate of Interest? 

Two equal sum were lent out at 7% and 5% S.I respectively. The interest earned on the two loans add up to ₹960 for 4 years. The total sum lent out is 

Nitin borrowed some money at the rate of 6% p.a. for the first three years, 9 % p. a. for the next five years and 13 % p.a. for the period beyond eight years. If the total interest paid by him at the end of eleven years is ₹8,160, the money borrowed by him ( in ₹ ) was -  

If x, y, z are three sum of money such that y is the simple interest on x and z is the simple interest on y for the same time and at the same rate of interest, then what is the relation between x, y, z we have – 

The simple interest on ₹ 4,000 in 3 years at the rate of x % per annum equals the simple interest on ₹ 5,000 at the rate of 12% per annum in 2 years. The value of x is 

A shopkeeper allows 23 % commission on his advertised price and still makes a profit of 10 %. If he gains Rs.56 on one item, his advertised price of the item, in Rs. is 

The cost price of an article is Rs. 800. After allowing a discount of 10 %, a gain of 12.5 % is made. Then the marked price of the article is