1.  A farmer built a fence around his square plot. He used 27 fence poles on each side of the square. How many poles did he need altogether?
A. 54
B. 84
C. 104
D. 108

Answer: Option C

Explanation:

Since each pole at the corner of the plot is common to its two sides.
Therefore total number of poles needed = 27 × 4 - 4 = 104.