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A history of the development of Pascal's triangle in its various manifestations

There are two numbers whose sum equals the difference of their squares.

A powerful, unvanquished, excellent black snake, 32 hastas in length, enters into a hole at the rate of 7 1/2 angulas in 5/14 of a day, and in the course of 1/4 of a day its tail grows 2 3/4 of an angula.

Original source material from seventeen mathematicians, with commentary by Stephen Hawking.

Wanting to know the breadth of a river, I measured a base of 500 yards in a straight line close by one side of it.

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.

This textbook seamlessly combines the history of non-Euclidean geometry with the mathematical ideas.

The triangle ABC has a right angle at C. Show that 1/ED=1/AC+1/AB

Determine the dimensions of the least isosceles triangle ACD that can circumscribe a given circle.

Given a wooden log of diameter 2 ch'ih 5 ts'un from which a 7 ts'un thick board is to be cut, what is the maximum possible width of the board?

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