I have an eye but still cannot see.

Who am I?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

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

Who can jump higher than a Mountain?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You need to move three matchsticks to form three squares. Can you do it?