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

If eleven plus two equals one, what does nine plus five equal?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

My location can be determined by the below rebus.
So where am i ?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

What Deficiency does the below rebus represent?

VIT_MIN

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

If it took eight men ten hours to build a wall, how long would it take four men to build it?