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

If 1 + 4 = 9, 2 + 8 = 18, 3 + 6 = 15 then 7 + 8 =?

Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
 24 : -192 :: -31 : 248 :: -18 : ? 

Three Statements are given followed by Three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:
 All books are copies.
 No copy is a pen.
 Some erasers are books.

Conclusions:
 I. Some copies are erasers.
 II. Some pens are books.
 III. No eraser is a pen.

Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.
 EACH : AEHC :: GAME : AGEM :: IDOL : ?

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 number from among the given options that can replace the question mark (?) in the following series. 

Question figure.

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.

Which of the following statements is false according to the above-mentioned arrangement?

A # B means ‘A is the sister of B’
 A @ B means ‘A is the daughter of B’
 A & B means ‘A is the husband of B’
 A % B means ‘A is the father of B’
 If A % B & C # D @ E, then how is B related to E?