In the given figure, how many papers are also hard?

Confirmed: Inveterate:: Financial : ? 

5 : 30 :: 8 : ?

Direction: Read the following information and answer the questions given below it:
Six students A, B, C, D, E and F are sitting in the field. A and B are from Nehru House while the rest belong to Gandhi House. D and F are tall while the others are short. A, C and D are wearing glasses while the others are not.

Which short student of Gandhi House is not wearing glasses?

A person walks 8 km. in the East direction. Therefrom, he moves 5 km. in the North-West direction. From that place he walks 6km. in the South direction. His last point will be in the direction _______ from starting point?  

One day Faheema left school and walked 12 km towards North then she turned towards right and walked 7 km and then she turned towards left and walked 12 km. Again she turned towards right and walked 1 km. How much distance would she has to walk to reach her school straight? 

XYZ, ABC, UVW, DEF, RST, GHI,_ ? 

Direction: In each of the following questions, find out which of the letter series follows the given rule.

The group of letters should not contain more than two vowels.