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Rows of Apple Trees

Math brain teasers require computations to solve.


Puzzle ID:#1086
Fun:*** (2.69)
Difficulty:*** (2.11)
Submitted By:mephistopheles*
Corrected By:BobbyKat




An apple farmer goes to the nursery to buy 10 apple trees. The owner says that if the farmer can plant the 10 trees in 5 rows of 4, he can have the trees for free. How does the farmer do it?

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Sep 25, 2005

awesome teaser I loved it. not extremely hard not extremely easy. perfect.
Apr 12, 2006

Apr 27, 2006

Rows cross so each tree is in two rows. One tree is planted at each point (convex vertice) of star. One tree is planted at each crotch (concave vertice) of star. A row of 4 includes two trees at adjacent crotches and those on the points in line with them.
Nov 12, 2006

Very easy, but not a bad one. You need to mislead people, otherwise it becomes like "What is another name for the sun?" - it took me a whole five seconds, so really - mislead them to water
Jan 16, 2007

Feb 08, 2009

This is an old classic teaser, not an original.
Mar 14, 2014

good teaser!

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