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Suppose that for every 4 cows a farmer has, he should plow 1 acre of land, and allow 1 acre of pasture for every 3 cows; how many cows could he keep on 140 acres?

An Introduction to the History of Mathematics

Howard Eves' sixth edition is still worth considering for a textbook.

Difference of Squares

Having been given the sum of two numbers, a, and the difference of their squares, b, find the numbers.

Coins

A boy gives 11 coins of equal denomination to a man, and the man finds that their total value in yen is 4 less than his age.

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...