Quantitative Aptitude - Arithmetic Ability Questions

A's salary is 50% more than that of B. Then B's salary is less than that of A by

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

Two runners A and B start running at 12 km/hr and 16 km/hr towards each other. They meet after 1 hour and 30 minutes. How far (in km) were they from each other when they started?

Which of the numbers given below is the square root of 14161?

4 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?

In an ornament the ratio of gold and copper is 3:2. The percentage of gold in the ornament is:

The average salary of male employees in a firm was Rs. 5200 and that of females was Rs. 4200. The mean salary of all the employees was Rs. 5000. What is the % of female employees?

What is the simplified value of Sec ACot A + Tan A2 ?