What will the diameter of a sphere be, when its volume and surface area are expressed by the same number?

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

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.

Seven men held equal shares in a grinding stone 5 feet in diameter. What part of the diameter should each grind away?

Given a pyramid 300 cubits high, with a square base 500 cubits to a side, determine the distance from the center of any side to the apex.

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?

A barrel has various holes in it. The fist hole empties the barrel in three days...

In a rectangle, having given the diagonal and perimeter, find the sides

Given two circles tangent to each other and to a common line, determine a relationship between the radii and the distance between the tangent points.

Determine the different values of x, when a certain function hits a minimum.

Given a door and a measuring rod of unknown dimensions, the rod is used to measure the door.