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.

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

When is the top of a mountain similar to a savings account?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Can you find the key in the picture below?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

In the picture given below, can you find out which digit will take place of the question mark?

what's the probability of getting a king or a queen from a pack of 52 cards?

What does the below rebus riddle means?

What am I?