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This is a page from a manuscript of the Algebra (Maqalah fi al-jabra wa-al muqabalah) of Omar Khayyam (1048-1131). This work is known for its solution of the various cases of the cubic equation by finding the intersections of appropriately chosen conic sections.
A fellow said that when he counted his nuts by twos, threes, fours, fives and sixes, there was still one left over; but when he counted them by sevens they came out even. How many did he have?
A ladder has 100 steps. On the first step sits 1 pigeon; on the second, 2; on the third, 3; and so on up to the hundredth. How many pigeons in all?
A survey of the mathematics education of cadets in the first century after the founding of the U.S. Military Academy.
In a circle whose circumference is 60 units, a chord is drawn forming a segment whose sagitta is 2 units. What is the length of the chord?
Image of first arithmetic book published in the English colonies in what is now the Eastern United States
In a given square, inscribe 4 equal circles so that...
A two door gate of unknown width is opened so that a 2 inch gap exists between the two doors.
A collection of illustrations of Inca quipus, with references to their earliest descriptions.

Having been given the lengths, a and b, of two straight lines drawn from the acute angles of a right triangle to the middle of the opposite sides, determine the lengths of those sides.