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Problems from Another Time

Individual problems from throughout mathematics history, as well as articles that include problem sets for students.

Now given a cylindrical log of unknown size buried in a wall...
A man plants 4 kernels of corn, which at harvest produce 32 kernels: these he plants the second year; now, supposing the annual increase to continue 8 fold, what would be the produce of the 15th year, allowing 1000 kernels to a pint?
If 12 oxen eat up 3 1/3 acres of meadow in 4 weeks and 21 oxen eat up 10 acres of exactly similar meadow in 9 weeks, how many oxen shall eat up 36 acres in 18 weeks? (Hint: The grass continues to grow.)