Brain Teasers
One Dollar Notes
A popular attraction at an exhibition was a sealed glass box containing 500,000 dollar notes. This was a fundraiser where for $10 a ticket a person could guess how many notes the box contained. At the end of the exhibition, when the seal was broken and the notes counted, there was only $470,000. Mr Koorc was responsible for enclosing the money. When questioned by Mr Ecilop, he said that he had personally counted every note by hand and to be sure, he had counted every note twice by hand during the five day exhibition. He insisted he may have been off by 80 or 90 dollars, but not 30,000! Mr Ecilop insists he is lying and arrests him immediately, but how can he be so sure?
Answer
It wouldn't have been possible to count the notes. Even once by hand and averaging one note per second, it would have taken over a week of nonstop counting.Hide Answer Show Answer
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