Quantitative Aptitude - Arithmetic Ability Questions

The average weight of 30 students in a class is 25 kgs. If the weight of the class teacher is added, the average weight increase by 2 kgs. The weight of the class teacher in kgs is

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?

A spaceship travels at 1,260 km/h. How many metres does it travel in 1/10 th of a second?

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 49π sq cm?

In ΔABC, ∠B=90 deg and BC= √3 AB. Find the measurement of ∠A

A tent is to be built in the form of a cylinder of radius 5 m surmounted by a cone of the same radius. If the height of the cylindrical part is 6 m and slant height of the conical part is 10 m, how much canvas will be required to build the tent? Allow 20% extra canvas for folding and stitching. (Take π = 22/7)

What is the value of 7293 + 441 - 3433 ?

If 5x/2 - [7(6x - 3/2)]/4 = 5/8, then what is the value of x?