Tricky brainteaser stumps almost everyone - but the answer is 'simple' Here’s a riddle that has confounded many: A person is 15 years old in 1990, but just five years later, in 1995, they’re 10 years old.
So, for example, if a person is born in 2005 BC, they would be 15 years old in 1990 BC, as the years are getting closer to the year zero.
By 1995 BC, the person would be 10 years old, because time is moving backwards towards the birth of Christ.
Imagine it like this: the person is 15 in 1990, and by 1995, their age is 10, because the years are actually counting down instead of moving ahead.
This means that rather than getting older as the years move forward, their age decreases as the years go on.
