Quantitative Aptitude - Arithmetic Ability Questions

If 2x+29x = 4, then the value of 27x3+127x3

The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?

A water tank is 2/5 th full. Inlet A can fill the tank in 12 minutes while an outlet pipe B can empty it in 6minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

From an external point two tangents to a circle are drawn. The chord passing through the points of contact subtends an angle72° at the centre. The angle between the tangents is?

Find the median, mode and mean of 9, 5, 8, 9, 9, 7, 8, 9, 8.

Coefficient of x2in (x + 9)(6 - 4x)(4x - 7) is

A certain sum when invested at 5% interest compounded annually for 3 years yields an interest of Rs.2522. Find the Principal?

In the given figure, AB is a diameter of the circle with center O and XY is the tangent at a point C. If ACX = 35 deg, then what is the value (in deg) of CAB?