Quantitative Aptitude - Arithmetic Ability Questions

The value of cos220° + cos270°is

What is the average of all numbers between 8 and 74 which are divisible by 7?

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

Find the odd word/letters/number from the given alternatives.

The prices of chairs and tables are in the ratio of 9 : 5. If the chairs cost Rs. 4200 more than the tables, find the price of the tables? (in Rs.)

Select the odd word/letters/number/number pair from the given alternatives.

If 1/√(cosec2A - 1) = x, then value of x is

In triangle PQR, A is the point of intersection of all the altitudes and B is the point of intersection of all the angle bisectors of the triangle. If ∠PBR =105°, then what is the value of ∠PAR (in degrees)?