Sum of three consecutive even integers is 54. Find the least integer among them.

Answer: Option D

$$\begin{array}{rl}& x+\left(x+2\right)+\left(x+4\right)=54\\ & 3x+6=54\\ & 3x=48\\ & x=16\\ & \\ & \mathbf{Alternate}:\\ & \text{Middle number = }\frac{54}{3}=18\\ & \text{then number is 16,18,20}\\ & \text{Smallest number is 16}\end{array}$$