46.--MARY AND MARMADUKE.

From Amusements in Mathematics by Henry Ernest Dudeney.

Marmaduke's age must have been twenty-nine years and two-fifths, and Mary's nineteen years and three-fifths. When Marmaduke was aged nineteen and three-fifths, Mary was only nine and four-fifths; so Marmaduke was at that time twice her age.

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46.--MARY AND MARMADUKE.: Amusements in Mathematics by Henry Ernest Dudeney | amphi