Quantitative Aptitude - Arithmetic Ability Questions

If a + b = 17 and a - b = 9 then the value of (4a2 + 4b2) is,

The average revenues of 7 consecutive years of a company is Rs 79 lakhs. If the average of first 4 years is Rs 74 lakhs and that of last 4 years is Rs 86 lakhs, what is the revenue for the 4th year?

To get number 40, the number 56/9 should be multiplied with

Pipes A, B, and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hours, respectively, the third can drain the cistern, when filled, in 6 hours. If all the three pipes are opened simultaneously when the cistern is three-fifth full, how many hours will be needed to fill the cistern?

In an isosceles triangle ABC, AB = AC, XY || BC. If ∡A = 30, then ∡BXY =

An inverted conical shaped vessel is filled with water to its brim. The height of the vessel is 8 cm and radius of the open end is 5 cm . When a few solid spherical metallic balls each of radius 1⁄2 cm are dropped in the vessel , 25% water is overflowed. The number of balls is:

ΔPQR is right angled at Q. If m∠R = 45°, then find the value of (tanP - 1/2).

The compound interest on Rs. 1000 at 10% per annum for 3 years in (Rs.) is