Fifty-year-old Scientist

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.




Similar Riddles

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Asked by Neha on 08 Mar 2023


You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Asked by Neha on 10 Jul 2021

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Asked by Neha on 20 Oct 2024


John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Asked by Neha on 12 Feb 2024

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

Asked by Neha on 22 Jun 2023

I have eight fingers and two thumbs but I do not live. What Am I?

Asked by Neha on 21 Mar 2024


I am quite hot but become too cold if you remove the first two letters. What am I?

Asked by Neha on 24 May 2023

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Asked by Neha on 20 Mar 2023

No matter how little or how much you use me, you change me every month. What am I?

Asked by Neha on 27 Jul 2025


When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Asked by Neha on 10 Oct 2021

Hot Articles

Amazing Facts

Crossword puzzles

In the 1920s, people feared that crossword puzzles would contribute to illiteracy.