Direction: Percentage of different types of employees in a company in two consecutive years.

In 1997 the total number of which of the following types of pairs of employees was approximately equal to the employees in 1998? 

The average monthly income of A and B is Rs.15,050 , and the average monthly income of B and C is Rs.15,350 and the average income of A and C is Rs.15,200. The monthly income of A is.

If the side of the square is increased by 30%, then how much % does its area get increased?

If an article is sold at 200 % profit then the ratio of its cost price to its selling price will be 

3 men or 5 women can complete a work in 12 days. Accordingly, how much time will it take for 6 men and 5 women to do the same work?

The average weight of 5 men is increased by 4 kg. If one of them who weigh 121 kg is replaced by another man, then what is the weight of the new man? 

Direction (66-70): What should come in place of the question mark(?) in the following number series?

729, 243, 81, 27, ?

If a+b = 1 and a³+b³+3ab=k, then the value of k is :