Quantitative Aptitude - Arithmetic Ability Questions

The average age of 40 students of a class is 16 years. If the average age of 24 students is 15.5 years and that of the 15 students is 16 2⁄3 years, then the age of 40th student is

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?

If 5x + 6(3-2x) = 4, then what is the value of x?

List price of TV is Rs. 2300 and discount series found to be 25% and 10%. Then the selling price of TV is

If sec -7π/4 = x, then the value of x is

A sum fetched a total simple interest of Rs 5320 at the rate of 7% per year in 5 years. What is the sum?

If cot(A/2) = x, then x is equal to

If x = 3+13, then the value of x-12642x-1x-233 is