RPH Editorial Board Solutions for Chapter: Missing Numbers, Exercise 1: EXERCISE

In given question below which one number can be placed at the sign of interrogation?

In given question below which one number can be placed at the sign of interrogation?

$$\begin{gathered} 42 \left(21\right) 22 \\ 78 \left(?\right) 84 \\ 162 \left(18\right) 99 \end{gathered}$$

In given question below which one number can be placed at the sign of interrogation?

In given question below which one number can be placed at the sign of interrogation?

In given question below which one number can be placed at the sign of interrogation?

In the figure given below which one number can be placed at the sign of interrogation?

In given question below which one number can be placed at the sign of interrogation?

$$\begin{gathered} 6 \left(40\right) 4 \\ 3 \left(12\right) 3 \\ 7 \left(?\right) 2 \end{gathered}$$

In given question below which one number can be placed at the sign of interrogation?