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

There is a place where if I stand up straight, I will still be considered sideways.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

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

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?