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Images from a 16th century text about the astrolabe and its uses
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.
A new sourcebook containing the works in their original form along with a translation and a brief commentary.
There are two numbers whose sum equals the difference of their squares.
A biography of Arthur Cayley, the outstanding mathematician of Victorian Britain.
A guest on horseback rides 300 li in a day. The guest leaves his clothes behind and the host rides off to catch up with the guest once he discovers the clothes. Assuming the host rides without stop tell how far he can go in a day?
One military horse cannot pull a load of 40 dan; neither can 2 ordinary horses, nor can three inferior horses.
Suppose that the propability of success in an experiment is 1/10. How many trials of the experiment are necessary to insure even odds on it happening at least once?
If a ladder, placed 8 ft. from the base of a building 40 ft. high, just reached the top, how far must it be placed from the base of the building that it may reach a point 10 ft. from the top?
Greek ladders for approximating square roots may be more ancient than the ancient Greeks. Students at any level can appreciate their beauty and simplicity. Those who have studied calculus can compare them with Newton's Method for approximating roots.

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