Delhi Police Constable Exam Model Paper 5

Let the present age of Raju be ‘x’
According to the given information,
The age of Raju after 15 years will be 5 times his age 5 years back.
$\mathit{x}+15=5\left(\mathit{x}\mathit{–}5\right)$
⇒ $\mathit{x}+15=5\mathit{x}\mathit{–}25$
⇒ $5\mathit{x}-\mathit{x}=15+25$
⇒ $4\mathit{x}=40\Rightarrow \mathit{x}=10$
Raju is 10 years old now.
Hence, '10' is the correct answer.