Henry Ernest Dudeney/Puzzles and Curious Problems/212 - Transplanting the Trees/Solution

Puzzles and Curious Problems by Henry Ernest Dudeney: $212$

Transplanting the Trees

A man has a plantation of $22$ trees arranged in the manner shown.

How is he to transplant only six of the trees so that they shall then form $20$ rows with $4$ trees in every row?.

Solution

The trees which were moved are in red, while the places where they were moved from are in white.

The $20$ lines of $4$ trees are shown as dotted lines.

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Solutions: $212$. -- Transplanting the Trees
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $437$. Transplanting the Trees