Question

What will come at the place of a question mark $4,7,12,19,28,?$

• A. $49$
• B. $36$
• C. $30$
• D. $39$

Answer 1

The correct option is D

$39$

Explanation for the correct option.

From the given series , It is observed that,

$$\begin{gathered} \mathrm{First}\mathrm{term}=4 \\ \mathrm{Second}\mathrm{term}=4+\mathbf{3} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}=7 \\ \mathrm{Third}\mathrm{term}=7+\mathbf{5} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}=12 \\ \mathrm{Fourth}\mathrm{term}=12+\mathbf{7} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}=19 \\ \mathrm{Fifth}\mathrm{term}=19+\mathbf{9} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}=28 \\ \mathrm{Sixth}\mathrm{term}=28+\mathbf{11} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}=39 \end{gathered}$$

Hence, option $D$ is correct.