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Brain Teaser of the Month



Mensa No. 50

A FROG

 






A frog sits on a lily pad in the precise middle of a circular pond with a radius of 6 meters (19 feet).  He jumps straight toward the edge of the pond a distance of 3 meters (9 feet, 6 inches), but this tires him and every subsequent jump is precisely half the distance of the jump before (i.e., 1.5 meters (4 feet, 9 inches), 75 cm (2 feet, 4.5 inches), etc.).

 

How many jumps does it take him to reach the edge of the pond?

"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices, but honestly and courageously uses his intelligence and fulfills the duty to express the results of his thought in clear form."


---Albert Einstein, Physicist

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