If two signs, ‘+ and ÷’ are interchanged, which of the following equation will be correct?

Direction : Six laptops O, R, Q, M, S and B are placed in a row facing towards the north (Not necessarily in the same order). O is placed to the immediate left of B. S is placed second to the left of R. Q is placed second to the right of B. Q is placed to the immediate right of S. M is placed to the left of O.

Which laptop is placed to the immediate right of M.?

What comes next in the series?
765, 642, 519, 396, 273 ?

Below are given statements followed by some conclusions. Read them to answer the question below.
1. College education is very expensive these days.
2. College education should be restricted to few.
Conclusions:
I. Nobody can afford to go to college.
II. Even the poor should have access to affordable college education.
Which of the given conclusions logically follow(s) from the given statements.

In a specific code language, a driver is called a farmer, a farmer is called an engineer, and an engineer is called a doctor. So who will plough the field? 

In each of the following questions one/two statements are given followed by two conclusions (I) and (II). You have to consider the two statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow from the given statements.

Statement: Some books are Magazines
Some magazines are Novels
Conclusion
(I) Some books are Novels
(II) Some Novels are Magazines

Aman starts from a point A towards south. To reach a point B. from there he turned 270° anticlockwise and walk to reach a point C. in which direction is he facing now?

If ‘nso ptr kli chn’ stands for ‘sharma gets marriage gift’, ‘ptr inm wop chn’ stands for ‘wife gives marriage gift’, ‘tti wop nhi’ stand for he gives nothing’, what would mean gives?