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.

The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

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

Which number comes next in the number series?

2, 9, 30, 93, ?

I am white when I am dirty, and black when I am clean. What am I?