Challenging Brain Teaser for December 3, 2016: Test Your Skills Today!

Measuring 4 ml of Medicine with Two Containers

Overview

A pharmacist needs to measure exactly 4 ml of medicine using only a 5 ml container and a 3 ml container.

Step-by-Step Solution

1. The pharmacist begins by filling the 5 ml container completely with the medicine.
2. He then pours the contents of the 5 ml container into the empty 3 ml container, which he subsequently empties.
3. Next, the pharmacist transfers the remaining 2 ml of medicine from the 5 ml container into the 3 ml container.
4. He refills the 5 ml container with more medicine.
5. The pharmacist carefully pours from the 5 ml container into the 3 ml container, which already contains 2 ml. This requires only 1 ml to fill the 3 ml container to capacity.

Conclusion

After this process, the pharmacist will have exactly 4 ml of medicine remaining in the 5 ml container, achieving the desired measurement.