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

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

What has hands, but can’t clap?

It is always ahead of me yet I can never see it. What is it?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Who always enjoys poor health?

What is always in front of you but can’t be seen?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?