Quantitative Aptitude - Arithmetic Ability Questions

The quadratic equation 1+a2x2+2abx+b2-c2=0 has only one root. What is the value of c21+a2 ?

If cosec 240° = x, then the value of x is

The ratio of ages of father and son is 7:2. Five years ago the product of their ages was 150. What is the age of the father?

45 men or 60 boys can do a piece of work in 20 days. How many days will 15 men and 20 boys take to complete the work?

In the first 39 overs of a cricket match, the run rate was 4.6 runs/over. Calculate the required run rate in the remaining 11 overs to reach the target of 252 runs?

A and B together can do a piece of work in 9 days. If A does thrice the work of B in a given time, the time A alone will take to finish the work is

Solve the following : -1/4 { -45 - (-96) / (-32)} = ?

S, T and U started a business and their capitals are in the ratio of 3 : 4 : 6. At the end they receive the profit in the ratio of 1 : 2 : 3. What will be the respectiveratio of time period for which they contributed their capitals?