Quantitative Aptitude - Arithmetic Ability Questions

A dealer sells a machine having marked price as Rs 3840 at a discount of 20%. What is the selling price (in Rs) of the machine?

What is the value of [(sin 7x – sin 5x)÷(cos 7x + cos 5x)] – [(cos 6x – cos 4x)÷(sin 6x + sin 4x)]?

If 1/√(1+tan2A) = x, then value of x is

A car travels a certain distance at 24 km/h and comes back at 36 km/h. Find the average speed for total journey.

Asif is twice as good as workman as Bashir and together they finish a piece of work in 30 days. In how many days will Asif alone finish the work?

A contractor has got two orders A and B. On one (A) he spends Rs. 25,000 and makes a bill of Rs. 30,500. On the other (B) he makes a bill keeping a profit of 20%. Which of the two orders is more profitable to him?

Average of all even numbers between 222 and 250 is __________.

The cube of 997 is