Aptitude and Reasoning Questions

A and B together do a job in 15 days and A alone could do the same job in 20 days. How many days would B take to do half the job if he worked alone?

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in X-axis to (-5,1). The co-ordinates of point R are?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C A E, F D H, I G K, ?

The question below has three statements followed by two conclusions numbered I and II. You have to take the three given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:
Some rings are bracelets.
All bracelets are earrings.
All earrings are necklaces.

Conclusions:
I. All those bracelets which are earrings can never be a ring is a possibility.
II. There is a possibility that all rings are necklaces.

In the following question, select the related letter pair from the given alternatives.PIR : OHQ : : ? : ?

Given below is a statement followed by some conclusions. Decide which of the given conclusions logically follows from the given statements.

Statement : All poets are readers. No reader is wise.

Conclusions :
I. No poet is wise.
II. All readers are poets.

P does half as much work as Q in 1/3 of the time. If together they take 15 days to complete a work, how many days will P take to do it alone?

A is D's brother. D is the son of Mrs. C. B is Mrs. C's father. How is A related to B?