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 does an Island and the letter T have in common?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

What is wrong in the below Picture?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

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?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?