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

LE, OJ, UO, DT,?

Directions: In each of the following questions, identify the diagram that best represents the relationship among classes given below:

Teacher, Painter, Dramatist

Select the set in which the numbers are related in the same way as are the numbers of the following set. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g., 13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed).
 (25, 9, 56)
 (13, 14, 183)

Select the number from among the given options that can replace the question mark (?) in the following series.
 16, 32, 14, 19, 37, 21, 22, 42, ?, 25, 47, 35 

Direction: Study the following information carefully and answer the given questions. Fourteen people are sitting in 2 rows, 7 in each. P, Q, R, S, T, U, and V in row 1 facing south and A, B, C, D, E, F, and G in row 2 facing north but not necessarily in the same order. People in both rows face each other.

U is sitting third from on of the extreme ends. Two persons are sitting between the one facing U and D. Three persons are sitting between the immediate neighbor of the one who is facing D and S. E is facing the immediate neighbor of S. A is sitting to the immediate right of E. P and Q does not sit at any of the ends. Two persons are sitting between the one who is facing the immediate neighbor of P and A. At least three persons are sitting between the one facing A and Q. B is facing the one who is sitting second to the left of Q. R is neither facing E nor B. C is sitting fourth to the left of G. V is sitting to second to the right of T.

____ is sitting second to the right of U.

Select the option that is related to the third word in the same way as the second word is related to the first word. (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word)
 Knife : Cut :: Ladle : ?

Read the following information carefully and answer the questions given below.
'3+2' means '3 is the father of 2'.
'3 – 2' means '3 is the sister of 2'.
'3 × 2' means '3 is the husband of 2'.
'3 ÷ 2' means '3 is the wife of 2'.

Which of the following means, B is the mother-in-law of R? 

In each of the following questions, certain pairs of words are given, out of which the words in all pairs except one, bear a certain common relationship. Choose the pair in which the words are differently related?