Quantitative Aptitude - Arithmetic Ability Questions

If cot π/3c -­ tan π/4c = x, then the value of x is

On selling 56 chairs, Mohan earns profit equal to the selling price of 6 chairs. What is the profit percentage?

A person driving at the speed of 40 kmph reaches office 1 minute early while he reaches 3 minutes late if driving at 36 kmph. What is the distance in km that she is covering?

A can do a work in 24 days and B in 40 days. If they work on it together for 10 days, then what fraction of work is left?

A car travels a certain distance at 34 km/h and comes back at 66 km/h. What is the average speed for total journey?

Find the degree of the polynomial 8x4 + 2x2y3 + 4

In an army selection process, the ratio of selected to unselected was 5:1. If 100 less had applied and 20 less selected, the ratio of selected to unselected would have been 6:1. How many candidates had applied for the process?

In a bag the ratio of red balls to green balls is 4 : 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 : 3. How many red balls are there in the bag?