Sum of the factors of 4b²c²-(b²+c²-a²)² is : 

Rahul and Rohan enter into a partnership with   their capitals in the ratio 7:9. At the end of 8^th month, Rahul  withdraws his capital. If they receive the  profits in the ratio 8:9, find how long Rohan’s capital was used.

A and B started a business with investments Rs 3500 and Rs 2500 respectively. After 4 months C joined with Rs 6000. If the difference between C's share and B's share in the annual profit was Rs 1977, what was the total annual profit? 

There are 24 peaches, 36 apricots and 60 bananas and they have to be arranged in several rows in such a way that every row contains the same number of fruits of only one type. What is the minimum number of rows required for this to happen? 

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

4, 5, 14, 51, ?

Study the following graph to answer these questions :
Percent profit earned by two companies A & B over the years.
Profit = Income – Expenditure

Expenditure of Company B in 1999 was 90% of its expenditure in 1998. Income of Company B in 1999 was what percent of its income in 1998?

In an office there are 50 men and 30 women and their average salary is Rs.22500 and every woman gets Rs. 400 less than a man. Find the salary of a man.