Multiple choice general knowledge math & puzzles

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?

  1. 100

  2. 104

  3. 108

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A square has 4 sides. If each side has 27 poles, the 4 corners are shared between two sides. The formula is $4n - 4$, where $n$ is the poles per side. $4(27) - 4 = 108 - 4 = 104$. Simply calculating $27 \times 4 = 108$ double-counts the corners.

Keep practicing — related questions