The price of a machine in a leather factory depreciates at the rate of 10% every year. If the present price of the machine be ₹ 100000, let us calculate what will be the price of that machine after 3 years.

At present the population of village of Pahalanpur is 10000; if population is being increased at the rate of 3% every year, let us write by calculating its population after 2 years.

Rate of increase in population of a state is 2% in a year. The present population is 80000000; let us calculate the population of the state after 3 years.

As a result of Sarba Siksha Abhiyan, the students leaving the school before completion, the students are readmitted, so the students in a year in increased by 5% in comparision to its previous year. If the number of such readmitted students in a district be 3528 in the present year. Let us write by calculation, the number of students readmitted 2 years before in this manner.

Through publicity of road-safety programme, the street accidents in Purulia district are decreased by 10% in comparison to its previous year. If the number of street accidents in this year be 8748, let us write by calculating, the number of street accidents 3 years before in the district.