What Adam and Eve do not have but the rest of the people have?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Why is the Hole below a Lock?

Why did the Girl throw the butter out of the window?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Take away the whole and some still remain. What is it?

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

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?