Can you calculate the probability of getting a sum of six when a dice is thrown twice?

I travel all around the world but always stay in the corner. What am I?

I have branches, but no fruit, trunk or leaves. What am I?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

You need to arrange three 7 and mathematical symbols to form number 1?

Take one out and scratch my head, I am now black but once was red. What am I?

what one word does the below rebus identifies?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?