27 November 2015

Arithmetic & Algebraic Problems - FINDING A BIRTHDAY

Question: A correspondent informs us that on Armistice Day (November 11, 1928) he had lived as long in the twentieth century as he had lived in the nineteenth. This tempted us to work out the day of his birth. Perhaps the reader may like to do the same. We will assume he was born at midday.

Answer: The man must have been born at midday on February 19, 1873, and at midday on November 11, 1928, he had lived 10,17616 days in each century. Of course, the century ended at midnight on December 31, 1900, which was not a leap year, and his age on November 11, 1928, was 55 years and nearly 9 months.

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