Question

Which number would replace the question mark in the series? $7,12,19,?,39$

Answer 1

Determine the number that would replace the question mark in the series.

$7,12,19,?,39$

$$\begin{gathered} 7+5=12 \\ 12+7=19 \\ 19+9=28 \\ 28+11=39 \end{gathered}$$

Hence, the $\text{'}28\text{'}$ is number that replaces by the question mark.