Which letter-cluster will replace the question mark (?) to complete the given series?

LAT, NDR, PGP, ?, TML

The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.

Four clusters have been given out of which three are alike in some manner and one is different. Select the one that is different.

Options 

Directions: Study the following information carefully and answer the questions given below.
Seven persons sit around a circular table facing the center. F sits 4th to the left of K. Two persons sit between G and K. B sits immediate left of D. B and G are not an immediate neighbor. L does not sit immediate right of S.

How many persons sit between F and L when counted to the left of F?

Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

. If, 4 × 3 = 14; 5 × 4 = 18; 6 × 5 = 22, then find the value of 7 × 6.

Option

A # B means ‘A is the sister of B’.
 A @ B means ‘A is the son of B’.
 A & B means ‘A is the father of B’.
 A % B means ‘A is the mother of B’.
 If W @ Q # T & Y @ M % K, then how is Q related to K?

By interchanging the given two signs and numbers which of the following equation will be correct?
 – and +, 6 and 3