If 2 workers can complete painting 2 walls in exactly 2 hours.
How many workers would be needed to paint 18 walls in 6 hours?
A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?
If A men working A hours a day can do A units of a work in A days, then how many units of work can be completed by B men working B hours per day.
There are three keys to the three doors with different locks on them.
How many attempts would be needed to determine the exact keys for all the doors under all circumstances?
