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Imagine an urn with two balls, each of which may be either white or black. One of these balls is drawn and is put back before a new one is drawn.
This will be the fifth meeting of this kind, which brings together mathematics educators and researchers to share their teaching ideas and classroom experience in teaching mathematics based on historical, epistemological and cultural approaches.
A vessel is anchored in 3 fathoms of water and the cable passes over a sheave in the bowspirt which is 6 ft above the water.

A man, woman, and two boys desire to cross a river, but their boat has weight restrictions!

Review of a book that suggests that the accepted historical chronology is fundamentally flawed.

On an expedition to seize his enemy's elephants, a king marched 2 yojanas the first day.
Here is the title page of part I of the General Trattato di Numeri (General Treatise on Number and Measure) (1556) of Niccolo Tartaglia (1500-1557). This is an extensive work on elementary mathematics that was popular in Italy for several decades after its publication.
Poster of Banneker, with a brief description of his life and work.
A series of circles have their centers on an equilateral hyperbola and pass through its center. Show that their envelope is a lemniscate.
A railway train strikes a snowdrift which creates a constant resistance. How long does it take the snow to stop the train?