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.

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Move four matchsticks to the below square to form three squares?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

The Little ant seems to be always confused. Do you know why?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Find the missing letter in the last circle logically in the given below picture.

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?