A man invested a sum of money in Scheme A, at a rate of 15% per annum for simple interest, at the end of 2 years the amount received by him is invested in scheme B at 20% per annum for compound interest. If the interest received by him from scheme B at the end of 2 years is Rs. 2860, then find the sum invested by man in the beginning?

$$ \sqrt{217+\sqrt{48+\sqrt{256}}}=?$$

A person borrows some money for 5 years and the ratio of the loan amount: total interest amount is 5 : 2. Then find the ratio of the loan amount: interest rate is equal to 

If a : b = 7 : 9 and b : c = 5 : 7, then what is a : c ?

Krishna bought a camera and paid 20 % less than its original price. He sold it at 40 % profit on the price he had paid. The percentage of profit earned by Krishna on the original price was 

The current ages of Sonali and Monali are in the ratio 5:3. Five years from now, their ages will be in the ratio 10:7 Then, Monali’s current age is:

A sum of Rs. 2000 at 40% per annum compounded annually. Calculate the interest for the third year at compound interest.

If the cost of production of an article is 2/5 of its marked retail price, If it is sold at 10 % discount then what will be profit ?