Quantitative Aptitude - Arithmetic Ability Questions

If selling price and cost price of an article are Rs. 684.25 and Rs. 595 respectively, then what is the profit percentage?

At what point does the line 3x + y = -6 intercept the x-axis?

Which of the following numbers is not a prime number?

Find the average of all prime numbers between 20 and 50.

Select the option that is different from the remaining three alternatives.

From the top of a platform 7 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 50√3 m away from the tower, how tall was the tower?

What is the diameter (in cm) of a sphere of surface area 6.16 sq cm?

What are the co-ordinates of the centroid of a triangle, whose vertices are A(2 , 5), B(-4 , 0) and C(5 , 4)?