Which will be the blank term in the following series?

h_eg_fegh_eghfe_

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

QDXM : SFYN :: UIOZ : ?

Twenty students are standing in a straight-line facing North. Rina is standing sixth from the left end. There are only three students between Rina and Shweta. Radha is standing exactly between Shweta and Rina. Tina is standing sixth to the right of Radha. Anita is standing fourth from the right end of the line. There are more than four students between Rina and Tina.
How many people are standing between Anita and Tina?

From the given options, find the number that comes in place of the question mark.

Find the missing numbers from given figure?

Find the missing number

Seven persons A, B, C, D, E, F and G are standing in a row facing the same direction. B is second to the right of C. B is extreme end of the row. Two persons between A and D. D is immediate left of C. Who is 4th from the right end?

A, B, C, D, E , F, G and H are sitting around a circle facing the centre. B is the third to the right of A, who is third to the right of C. F is second to the right of E, Who is not the nearest neighbour of B. D is second to the left of H, Who is second to the left of G.

Who is sitting at the second to the left of A?