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The work of the great Renaissance artist/scientist Leonardo da Vinci can be taught in secondary schools through an integrated approach of several disciplines. This article explores the approach of the Ross School.
You have two sums of money, the difference of which is 2 dirhams; you divide the smaller sum by the larger and the quotient is equal to 1/2. What are the two sums of money?
A new edition of a brief history text, arranged topically rather than chronologically.
A new edition of a classic work on number theory.
There are two numbers which are to each other as 5 and 6 and the sum of their squares is 2196. What are the numbers?
Information on previous ESUs
A history of attempts to develop formulas expressing the sums of powers of the first n positive integers from the Pythagoreans to Jakob Bernoulli. With exercises.
Short sketches on how mathematicians work and think.
Now there are six-headed four legged animals and four-headed two-legged birds. Find the total number of animals and birds.
A ladder has 100 steps. On the first step sits 1 pigeon; on the second, 2; on the third, 3; and so on up to the hundredth. How many pigeons in all?

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