Quantitative Aptitude - Arithmetic Ability Questions

What is the difference (in Rs) between compound interest (compounded annually) and simple interest for 3 years on a principal of Rs 3000 at the annual rate of 20%?

What is the equation of line whose slope is -1/2 and passes through the intersection of the lines x - y = -1 and 3x - 2y = 0?

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is

In a camp 180 students had ration for 20 days. How many students should leave the camp if the ration should last for 25 days?

Five men or ten women can complete a job in 20 days. In how many days can 3 men and 4 women complete it?

Six years ago, the ratio of the two persons P and Q was 3 : 2. Four years hence the ratio of their ages will be 8 : 7. What is P's age?

In triangle PQR, A is the point of intersection of all the altitudes and B is the point of intersection of all the angle bisectors of the triangle. If ∠PBR =105°, then what is the value of ∠PAR (in degrees)?