Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 2 - 2z + z22 + 2z - z2, when z+2z = 2 ?

The ratio of two numbers is 6 : 11 and their difference is 65. What will be the smaller number among both the numbers?

A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is

Working 10 hours a day, Aman can complete a piece of work in 18 days. How many hours a day should he work so as to finish the work in 15 days?

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

One of the two inlet pipes works twice as efficiently as the other. The two, working alongside a drain pipe that can empty a cistern all by itself in 8 hours, can fill the empty cistern in 8 hours. How many hours will the less efficient inlet pipe take to fill the empty cistern by itself?

The simplified value of 3-212-18 - 13 × 27 - 12 x 273 is closest to

A right circular cylinder is partially filled with water. Two iron spherical balls are completely immersed in the water so that the height of the water in the cylinder rises by 4 cm. If the radius of one ball is half of the other and the diameter of the cylinder is 18 cm, then the radii of the spherical balls are