How many number between 1000 and 5000 are exactly divisible by 225 ?

Answer: Option B

$$\begin{array}{rl}& \text{First number = 1125}\\ & \text{Last number = 4950}\\ & \text{Number of term }\\ & \text{ = }\frac{4950-1125}{225}+1\\ & =\frac{3825}{225}+1\\ & =17+1\\ & =18\end{array}$$