The two consecutive integers between which the fraction $\dfrac{5}{7}$ lies are

1. 5 and 7

2. 5 and 6

3. 6 and 7

4. 0 and 1

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 which is not equal to $\dfrac{4}{5}$ is

1. $\dfrac{40}{50}$

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

3. $\dfrac{12}{15}$

4. $\dfrac{32}{40}$

Which of the following fractions is not in the simplest form?

1. $\dfrac{27}{28}$

2. $\dfrac{13}{33}$

3. $\dfrac{39}{87}$

4. $\dfrac{14}{9}$