$\sqrt[4]{\sqrt[3]{3^2}}$ can be expressed as :

1. $3^6$

2. $6^{1/3}$

3. $3^{1/12}$

4. $3^{1/6}$

$1.\overline{9} - 1.9$ is equal to :

1. 0

2. 1

3. 0.09

4. 0.1

Observe the values of a, b, c given in the table. If we choose numbers a, b and c from rows a, b and c respectively, what is the maximum possible value of $\dfrac{c - b}{a}$?

The portion of a number line between 0 and 4 has been divided into 16 equal parts. Highlight the portion of the number line in which the reciprocal of any rational number is greater than the number itself.