Arithmetical Problems

This chapter enhances our knowledge of ratio and proportion. We will learn how to convert and compare the ratio into their simplest form such as fraction. It briefs on proportion with the aid of examples.

This chapter sheds light on the unitary method and two kinds of variations, that is direct and inverse variations. It discusses methods of multiplying the ratios with examples. It also comprises problems based on time and work.

This chapter explains how to calculate the speed, time, and distance covered by a moving object. It discusses average and relative speed along with their formulas. We will also learn to solve problems related to the movement of trains, boats, and streams.

This chapter sheds light on the concepts related to percentages. It discusses some simple rules for converting fractions into percentages and vice-versa, percentage into a ratio, decimal into a percentage, etc.

This chapter deals with the concept of profit and loss. It defines the terms cost price, selling price, profit, loss, etc. We will also learn how to calculate the discount and discount percentages with the aid of examples.

In this chapter, we will learn about simple interest and compound interest in detail. It discusses the various terms associated with simple interest. We will also learn how to calculate simple and compound interest with the aid of examples.