What is the word or phrase?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What you cannot hold but it is yours?

Before Mount Everest was discovered, what was the highest mountain in the world?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?