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?

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

Assume that the human population after the flood was 6 and that 200 years later the population was 1,000,000. Find the annual growth of the population.

The sum of the two digits of a 2-digit number is 9. If 45 is subtracted from the number, the result will be expressed by the digits in reverse order. Find the number.

In a right triangle, let the perpendicular be 5 and the sum of the base and hypotenuse 25. Find the lengths of the base and hypotenuse

To find three quantities x.y, and z...

A cliff with a tower on its edge is observed from a boat at sea; find the height of the cliff and the tower.

There are two numbers which are to each other as 5 and 6 and the sum of their squares is 2196. What are the numbers?

What it took to get an 8th grade education in 1895

Suppose a ladder 60 feet long is placed in a street so as to reach a window 37 feet above the ground on one side of the street...

A lion, a wolf and a fox each take a certain amount of time to eat a goat separately. How long would it take all these animals together to eat the goat?