In a recreational activity, you are given four different jars of 2 liters, 4 liters, 6 liters and 8 liters respectively with an unlimited water supply. Then you are asked to measure exactly 5 liters of water using them.
How will you do it?
There is simple answer you may not have thought about...
You cannot measure an odd number of liters when we only have jars that hold odd amounts.