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Servois' 1814 Essay on the Principles of the Differential Calculus, with an English Translation

The authors provide an analysis and English translation of the argument by a little known French mathematician that calculus should be based on series rather than on infinitesimals.

The Magic Squares of Manuel Moschopoulos

A translation from the original Greek of a manuscript on magic squares by the Byzantine scholar Manuel Moschopoulos, written about 1315

Chuquet's Rule of Average Numbers

Prove Chuquet's rule of average numbers.

Numbers Game #2

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

Measuring America

The beginnings of land measurement in the early United States and how this affected American democracy.

Four Numbers

Given four numbers whose sum is 9900; the second exceeds the first by 1/7 of the first...

Two Men Meet

A square walled city measures 10 li on each side. At the center of each side is a gate. Two persons start walking from the center of the city.

Compound Interest

Suppose a man had put out one cent at compound interest in 1620, what would have been the amount in 1824, allowing it to double once in 12 years?

Review of The Chinese Roots of Linear Algebra

An excellent and careful study of matrix methods for solving systems of linear equations in first century China.

Farmer's Best Deal

How many calves, goats and pigs did the farmer buy?