Can you name some countries which do not have the alphabet 'A' in them?

Who has married many women but was never married?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

Can you name four days which start with the letter 'T'?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

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

Rearrange the letters in "new door" to make one word.

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?