Obtaining the perfect volume of petrol
You need 8 liters of petrol. Using two containers that can hold 12 and 9 liters, you can do any of the following actions as many times as you like:
- fill a container to its brim;
- completely empty a container;
- pour petrol from one container to another.
Is it possible to get exactly 8 liters (in either container)?
by
CZ Seow