If 5=10, 6=18, 7=28 then 8=?

In the following diagram find the missing number?

What is value placed at Question mark?
F: 37 :: I : __?

A prisoner introduced a boy who came to visit him to the jailor as “Brothers and sisters I have none, he is my father’s son’s son”. Who is the boy?

In the given figure, how many metallic balls are also heavy?

Direction: In the following question, select the related word from the given alternatives. 

College : Dean :: Museum : ? 

In a certain code language, “he is game” is written as “@#*”, “good game play” is written as “$*&”and “play that hard” is written as “!$%”.How is “good” written in that code language?

Three of the following four words are alike in a certain way and one is different. Pick the odd word out.