Fence Post Riddle: Why a 15 m Fence Needs 6 Posts
A straight 15 m fence with a post every 3 m needs 6 posts, not 5. Learn the gaps-plus-one rule, when it changes, and where the same trap hides.
Riddle10 blog
Riddle10 blog
A straight 15 m fence with a post every 3 m needs 6 posts, not 5. Learn the gaps-plus-one rule, when it changes, and where the same trap hides.