1990, 15 Years And 1995, 10 Years



In 1990 a person is 15 years old. In 1995 that same person is 10 years old.

How is this possible?

Ah! Click here to read the solution.



Three And Five Gallon



You have a three gallon and a five gallon measuring device.

How to measure out four gallons?

Ah! Click here to read the solution.