Two cars leave a city at the same time. One heads east at and the other heads west at . How far apart are they after hours?

Rosie, Eileen and Sasha order a pizza. It is divided into slices. Eileen eats slice. Roseanne eats twice as many slices as Sasha.

If there are slices of pizza remaining, how many slices did Sasha eat?

Michael has red shirts and blue shirts, such that the ratio is red shirts for every blue shirts. What is the minimum number of shirts he can have?

A farmer has units of fence. If he uses this to build a square fence, what will be the area enclosed by the fence?

A helicopter flies against the wind from city A to city B in 5 hours. The same helicopter returns from city B to city A, in the same direction as the wind, in 4 hours. Find the ratio of the speed of the helicopter to the speed of the wind.