Quantitative Aptitude - Arithmetic Ability Questions

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?

The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is

Raghuram sells a machine for Rs 43 lakhs at a loss. Had he sold it for Rs 53 lakh, his gain would have been 7 times the former loss. Find the cost price of the machine.

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

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?

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

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

Determine the value of a2+b2a3+b3 when a = 2+√3 and b = 2-√3.