# Problems from Another Time

Individual problems from throughout mathematics history, as well as articles that include problem sets for students.

The triangle ABC has a right angle at C. Show that 1/ED=1/AC+1/AB
Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions
A man went to a draper and bought a length of cloth 35 braccia long to make a suit of clothes.
What will the diameter of a sphere be, when its volume and surface area are expressed by the same number?
Two circles, the sum of whose radii is a, are placed in the same plane with their centers at a distance 2a...
A man has four creditors. To the first he owes 624 ducats; to the second, 546; to the third, 492; and to the fourth 368.
Three congruent circles of radius 6 inches are mutually tangent to one another. Compute the area enclosed between them.
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?
Determine the radii of three equal circles decribed within and tangent to a given circle, and also tangent to each other
A barrel has various holes in it. The fist hole empties the barrel in three days...