The number which exceeds 16% of it by 42 is :

Answer: Option A

Let the number be $$x$$
Then,
$$\begin{array}{rl}& x-16\%\text{of}x=42\\ & \iff x-\frac{16}{100}x=42\\ & \iff x-\frac{4}{25x}=42\\ & \iff \frac{21}{25}x=42\\ & \iff x=\left(\frac{42\times 25}{21}\right)\\ & \iff x=50\end{array}$$