The Frog Puzzle

Authors

Date of this Version

October 2007

Comments

Workshop on College Teaching and the Development of Reasoning -- Module 2 materials
© 1975 Regents of the University of California

Abstract

Professor Thistlebush catches 55 frogs and bands the left hind leg before releasing them back into the pond. The next week he captures 72 frogs, of whom 12 have been banded from the previous capture. Estimate how many frogs are in the pond.