Quantitative Aptitude - Arithmetic Ability Questions

In how many different ways could couples be picked from 6 men and 9 women ?

Factors of 48x3- 8x2- 93x- 45 are

The average of four consecutive odd numbers is 40. What is the largest number?

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

Find the standard deviation of {11, 7, 10,13, 9}

If a=101 then the value of a(a2-3a+3) is 

In a computer game, a builder can build a wall in ten hours while a destroyer can demolish such a wall completely in fourteen hours. Both, the builder and the destroyer were initially set to work together on level ground. But after 7 hours the destroyer was taken out. What was the total time (in hrs) taken to build the wall ?

If cotA + cotB = x, then value of x is