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.

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What can you hold in your right hand, but never in your left hand?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

What has one letter and starts with an E?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?