Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions

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

Curve sketching, tangent lines, and optimization, explored via interactive applets

There are two columns in the ruins of Persepolis left standing upright; one is 70 ft. above the plane, and the other 50 ft;

If 12 cattle eat up 3 1/3 acres of meadow in 4 weeks and 21 cattle eat up 10 acres of exactly similar meadow in 9 weeks, how many cattle shall eat up 36 acres in 18 weeks? (Hint: The grass continues to grow.)

A vessel is anchored in 3 fathoms of water and the cable passes over a sheave in the bowspirt which is 6 ft above the water.

If a ball 6 inches in diameter weighs 32 lbs, what will be the weight of a ball 3 inches in diameter?

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.

Find the two numbers such that multiplying one by the other makes 8 and the sum of their squares is 27

A castle has n rooms each of which has 7 samurai in it.

How high above the earth must a person be raised that he [or she] may see 1/3 of its surface?