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Essays on how number has been critical to the work of scientists through the ages.
Given four integers where if added together three at a time their sums are: 20, 22, 24, and 27. What are the integers?
The classic work by Dirk Struik is still worth reading, especially for its attention to the social context of the development of mathematical ideas.
Considering non-unique representation of Maya calendar numbers may help your students understand their own number system better.
A square circumscribed about a given circle is double in area to a square inscribed in the same circle. True of false? Prove your answer.
This is the title page of the Nova Scientia (1537) of Niccolo Tartaglia (1499-1557). In this work, Tartaglia discussed the mathematics of artillery and developed methods for determining the range of a cannon.
A merchant woman buys and sells apples and pears for Denaros. How much did she invest in apples; how much in pears?
Two ants are 100 paces apart, crawling back and forth along the same path. The first goes 1/3 pace forward a day and returns 1/4 pace; the other goes forward 1/5 pace and returns 1/6 pace. How many days before the first ant overtakes the second?
Apollonius found how to draw normals to an ellipse from points in the ellipse by using hyperbolas. A modern version is presented here.
A fox, a raccoon, and a hound pass through customs and together pay 111 coins.

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