Directions :Study the following information carefully and answer the given questions.
L. M. N, O, P, Q , R and S are sitting around a circular table facing the centre but not necessarily in the same order . P sits third to left of M. P is an immediate neighbour of both o and S. Only one person sits between O and Q. R is an immediate neighbour of O. Only one person sits between R and N. 

Four of the following five are alike in a certain way and thus form a group. Which is the one that does not belong to that group?

Direction: Study the following information carefully and answer the questions given below:
Eleven persons buy things one after another. Only five persons buy things after P. Three persons buy things between P and Q. R buy things after S and before T. There are as many persons buy things before U as after V. More than three persons buy things between W and X who buy things just after P. Y buy things before Z and after R. No one buy things after T. Y buy things just after V. U buys after Q.

Who among the following buy things between X and Z?

3, 18, 15, 24, 35,?....

In the following question, by using which mathematical operator will the expression become correct?
18 ?6 ? 9 ? 27

Six laptops, N, Q, P, L, R and A, are placed in a row facing towards the north (not necessarily in the same order). N is placed to the immediate left of A. R is placed second to the left of Q. P is placed second to the right of A. P is placed to the immediate right of R. L is placed to the left of N. Which laptop is placed to the immediate right of L?

Select the option that is related to the fourth term in the same way as the first term is related to the second term and the fifth term is related to the sixth term.
 8 : 496 :: ? : 204 :: 9 : 711

Directions: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.

l–n–mll-m–n–l

A series is given with one term missing. Choose the correct option from the given ones that will complete the series.

50 : 70 ::..?.... 90