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Brain Teaser – How long did Christopher live?

Christopher's youth lasted 1/6 of his life. He had his first beard in the next 1/12 of his life. At the end of the following 1/7 of his life Christopher got married. Five years from then his son was born. His son lived exactly 1/2 of Christopher's life. Christopher died 4 years after the death of his son. How long did Christopher live?

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