[X] Privacy Policy + T&C We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.

My grandfather was X years old in the year X squared. In which year was he born?

For example if he was 33 years old in the year 1089 AD (= 33 x 33), he would have been born in 1056 AD - but then of course he would currently be nearly a thousand years old! You can safely assume that none of my family had children when they were very, very old, and I'm not too old myself.

[Ref: ZOPC]

A good starting point would be to find the age he would have to be if we were talking about 2010, and 2010 = 44.8 x 44.8 (approx). So our first guess is aged 44 in 1936 (= 44 x 44), which means he was born in 1892.

Just to double check the next possible age. He could have been aged 43 in 1849 (= 43 x 43) and born in 1806, which was over 200 years ago, and the question said that he didn't have children as a very old man.

Back to the puzzles...

Top 10 Illusions

 Shadow Illusion Level Balance? Same Length Red Lines? Spinning Dancer Purple Nurple