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Planting Trees on Arbor Day

On Arbor Day the fourth grade class began planting trees. They finished planting five trees before the fifth grade class arrived. But they accidentally planted them on the fifth grade side of the street.

The fourth-graders crossed the street to start over, and the fifth-graders planted the remaining trees. They finished first and felt bad for the fourth-graders, so they crossed the street and planted five trees. They planted another five trees at which point all of the trees had been planted.

By how many trees were the fifth-graders ahead of the fourth-graders?

Ten. The fifth-graders planted five more trees than they were assigned, and the fourth-graders planted five fewer than their assignment.


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2 Comments on "Planting Trees on Arbor Day"


Scott says
April 8, 2015 @ 08:02

This puzzle is missing the assumed fact that “Both groups start with the same number of trees.”


SHADUP says
December 11, 2017 @ 19:58

SHADUP. I LIKE THESE RIDDLES. DON’T BE SALTY IF YOU DIDN’T GET IT RIGHT


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