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Information on previous ESUs
A wonderful survey of the history of mathematics, emphasizing its relationship with the ambient culture.
A compilation of ethnomathematical ideas from around the world.
A man bought a number of sheep for $225; 10 of them having died, he sold 4/5 of the remainder for the same cost and received $150 for them. How many did he buy?
Two officers each have a company of men, the one has 40 less than the other.
As this biography reveals, Servois fought in battles for Paris and for the foundations of calculus.
Two travelers, starting at the same time from the same point, travel in opposite directions round a circular railway.
An old Chinese general led his army to a river with a steep bank. Standing atop the bank, he held a stick 6 feet long perpendicular to himself.
The edge of a cloud is at an altitude of 20 degrees and the sun above it at 35 degrees. The shadow cast by the edge of the cloud fall on a object 2300 yards away, how high is the cloud?
Twenty-three weary travelers entered a delightful forest. There they found 63 numerically equal piles of plantain fruit.

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