Make of 10 three parts such that one part multiplied by 3 makes as much as the other multiplied by 4 and as the other multiplied by 5.

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This is the title page of the geometry book of Jacob Kobel (1460 - 1533). The book dealt primarily with measurement, showing its readers how to use various instruments to measure fields, determine heights of buildings, and perform various other necessary tasks.

A castle has n rooms each of which has 7 samurai in it.

Given a number, take 1/3 of the number away from itself and add 2. If this result is multiplied by itself, it equals the number plus 24. What is the number?

A historically minded textbook designed to teach real analysis by considering some of the problems faced by 19th century mathematicians.

Having been given the sum of two numbers,a, and the difference of their squares,b, find the numbers.

A circle is inscribed in an isosceles trapezoid. Find the relationship of the radius to the sides.

History of Maya calendars, including the modified base 20 number system used in them

A father wills his estate valued at $40, 000 to his three children. Before the settlement one of the children dies. What should the other two receive?

This is from a letter of June, 1695 in which Leibniz is discussing differentiation with Johann Bernoulli. The work in which these letters appear is the Virorum Celeberr. Got. Gul. Leibnitii et Johann Bernoulli Commercium Philosophicum et Mathematica, originally published in 1740.