Seven friends P, Q, R, S, T, U and V, each has got different marks in the board examination. P scored higher than only U and R. R scored higher than U. Q scored higher than S but lesser than T. T has not scored the highest among all. How many persons scored between Q and R?

2

P scored higher than only U and R ⇒ P > U and R 

R scored higher than U ⇒ R > U

Q scored higher than S but lesser than T ⇒ T > Q > S

T has not scored the highest among all

So, the correct order will be ⇒ V > T > Q > S > P > R > U 

So, there are two persons who scored between Q and R.