An introduction to the work of Venn as well as the work of the author in extending some of Venn's results.

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On a day in spring a boy has gathered cherry blossoms under a cherry tree. Nearby a poet is reading some of his poems aloud. As he reads, the boy counts out the cherry blossoms, one blossom for each word of a poem.

An argument that the teaching of elementary integration should better reflect its historical development

A series of circles have their centers on an equilateral hyperbola and pass through its center. Show that their envelope is a lemniscate.

An erect pole of 10 cubits has its base moved 6 cubits. Determine the new height and the distance the top of the pole is lowered.

A history of algebra from its early beginnings to the twentieth century.

Title page of Jacob Bernoulli's Ars Conjectandi (The Art of Conjecturing), published posthumously in 1713 by his nephew Nicolaus I Bernoulli. The Ars Conjectandi is famous for Bernoulli's statement of a general rule for summing integral powers as well as for the first statement and proof of the Law of Large Numbers.

A barrel has various holes in it. The fist hole empties the barrel in three days...

Given a semicircle, Prove that if O is the circle's center, DO=OE.