Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
AAI, AEI, AII, AOI, ?

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.

Select the set in which the numbers are related in the same way as are the numbers of the following set.
 (75, 25, 28)
 (136, 34, 38)
 (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 /deleting /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)

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
 RTM, VZX, ZFI, DLT, ?

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and ×, 1 and 2

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

TQT, ZSB, FUJ, LWR, ?

Directions: Study the following information carefully and answer the questions below.

Eight people- A, B, C, D, W, X, Y and Z are sitting in a circle facing the centre. All eight people are from different place i.e. Okhla, Dwarka, Lajpat Nagar, Chanakyapuri, Saket, Mehrauli, Rohini and Karol Bagh but not necessarily in the same order.

W is sitting third to the left of Y. The person who is from Dwarka is to the immediate right of W and W is not from Okhla. B is sitting fourth to the right of Z. Z is not the neighbour of Y. Neither B nor Z is an immediate neighbour of W. X is from Chanakyapuriand is sitting third to the right of the person from Dwarka. The person from Mehrauli is sitting second to the left of the person from Chanakyapuri. The person from Rohini is sitting second to the left of W. A who is Lajpat Nagar is sitting exactly between X and Z. The person from Saket is sitting second to the right of the person from Lajpat Nagar. C is sitting third to the left of X.

Who amongst the following persons belongs to Okhla?

Directions: Read the following information carefully and answer the questions given below it.
There are ten members in a family of four generation in which there are three married couples. V is sibling of U and she is unmarried. S is daughter-in-law of Q.W has two children. X is grandmother of U.P is father of V. W and X are married couples.  T is nephew of V. Q is mother of U.W is not father-in-law of P.Z is granddaughter of Q. R is a female member of the family.

How many persons are having less expensive gifts than U?