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Brain Teasers

Brain Teaser – December 28

Medical News Bulletin
By Medical News Bulletin
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medical humor doctor - joke

Dr. Johnson is 54 years old and his father is 80 years old. How many years ago was Dr. Johnson’s father three times Dr. Johnson’s age?

See the answer

Answer:  41 years ago.
Let N be the needed number of years. Then we have 3x(54-N)=80-N. Solving for N, we get 41.

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