Quantitative Aptitude - Arithmetic Ability Questions

The percentage change of a number when it is first decreased by 10% and then increased by 10% is

The area of a circle is 346.5 cm². Find its radius (in cm).

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

If θ>0, be an acute angle, then the value of it in degrees satisfying cos2θ-3cosθ+2sin2θ=1 is

If x , y, and z are real numbers such that (x - 3)2 + (y - 4)2 + (z - 5)2 = 0 then (x+y+z) is equal to

Point Q(-2,b) is the midpoint of segment EF. Co-ordinates of E are (-7,-6) and F are (a,0). What is the value of a and b?

Find the degree of the polynomial 8x4 + 2x2y3 + 4

In an alloy of German silver the ratio of copper to zinc was 17:7 while that of nickel to zinc was 4 :3. The ratio of copper to zinc to nickel in the alloy was