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.

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Why Wine Glass Stem is so long?

A cat, a dog and a monkey were stolen. 3 suspects got caught: Harish, Manoj and Tarun. All we know is each person stole one animal, but we do not know who stole which. Here are the investigation statements. Harish said: Tarun stole the cat. Manoj said: Tarun stole the dog. Tarun said: They both were lying. I did not steal the cat or the dog. Later on, the police found out the man who stole the monkey told a lie. The man who stole the cat told the truth. Can you find out who stole which?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Find the next number in the series.
1 10 24 43 67 ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?