Quantitative Aptitude - Arithmetic Ability Questions

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

Select the odd letters from the given alternatives.

Which of the following quadratic equations has real roots?

If (6x ­- 5) = (4x + 7), then the numerical value of (x + 1)3  is

[sinA/(1 + cosA)] + [(1 + cosA)/sinA] is equal to

The cash difference between the selling price of an article at a profit of 2% and 18% is Rs. 3. The ratio of two selling prices is

If sec (4x - 50°) = cosec(50° - x), Then the value of x is

If a cone of radius 3.5 cm and height 9.6 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder? (Take π = 22/7)