Quantitative Aptitude - Arithmetic Ability Questions

A car travels a certain distance at 32 km/h and comes back at 68 km/h. What is the average speed for total journey?

10 persons can do a job in X days. If 20 persons with twice the efficiency can do the same job in 5 days, then find the value of X?

If cost price of 5 cars is equal to selling price of 4 cars. Find the percentage of profit or loss?

What is the equation of a line having a slope -1/3 and y-intercept equal to 6?

If 14/3 + (1/2)(x - 7/3) = -2x/3, then the value of x is?

Sum of two numbers is thrice their difference. Their ratio is

PAB and PCD are two secants to a circle. If PA = 10 cm, AB = 12 cm and PC = 11 cm, then what is the value (in cm) of PD?

Three clocks are designed to alarm in every hour, two hours and three hours respectively. If they all alrmed together three hours before, then after how many hours will they next alarm together?