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The meaning of the term ratio and an illustrative example to explain the same

The rules governing ratios and fractions

Definition and explanation of the term proportion, continued proportion, direct variation and inverse variation

35 solved examples with explanation that helps the process of understanding and also the essential short cuts that would save time in arriving at the solution as and when applicable

21 exercise problems with the answer key and explanatory answers
An objective type speed test with around 50 questions with explanatory answers and answer key provided for the speed test

Here is an example of a typical solved example in this chapter.
Sample Question
Question: What is the value of 'x' if it is the mean proportional of x - 4 and x + 8?

Explanatory Answer
As x is the mean proportional of x - 4 and x + 8, we have x - 4 : x :: x : x + 8
Therefore,
Or x2 = (x-4)(x+ Cool

=> x2 = x2 + 4x - 32
Therefore, x = 8