In the adjoining figure, the shaded part is represented by the fraction:

1. $\dfrac{3}{8}$

2. $\dfrac{3}{7}$

3. $\dfrac{4}{8}$

4. $\dfrac{3}{6}$

In the adjoining figure, the shaded region is represented by the fraction:

1. $\dfrac{4}{12}$

2. $\dfrac{5}{12}$

3. $\dfrac{5}{24}$

4. $\dfrac{4}{24}$

Which of the following pairs of fractions are not equivalent?

1. $\dfrac{3}{4}, \dfrac{15}{20}$

2. $\dfrac{14}{21}, \dfrac{4}{6}$

3. $\dfrac{8}{10}, \dfrac{12}{15}$

4. $\dfrac{6}{14}, \dfrac{10}{25}$

The fraction equivalent to $\dfrac{45}{81}$ is

1. $\dfrac{90}{243}$

2. $\dfrac{15}{9}$

3. $\dfrac{5}{27}$

4. $\dfrac{5}{9}$