By selling 15 mangoes, a fruit seller gains the selling price of 3 mangoes. His gain is

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

One fill pipe A takes 3 minutes more to fill the cistern than two fill pipes A and B opened together to fill it. Second fill pipe B takes $$ {21{1\over 3}}$$ minutes more to fill cistern than two fill pipes A and B opened together to fill it. When will the cistern be full if both pipes are opened simultaneously?

At what rate percent per annum will a sum of Rs.5000 amount to Rs.6000 in 4 years?

Find compound interest on Rs. 50000 at 12 % per annum for 6 months, compounded quarterly. 

Direction: Study the double bar graph given below and answer the questions.

The average of the number of students participating in cultural events is:

Find out the H.C.F of 306, 204 and 136.