Quantitative Aptitude - Arithmetic Ability Questions

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

What is the value of 128 + 7232

There is 40% increase in an amount in 8 years at simple interest. What will be the compound interest of Rs. 36000 after 2 years at the same rate?

The mean of a distribution is 18 and the standard deviation is 4.5. What is the value of the coefficient of variation?

Smaller diagonal of a rhombus is equal to length of its sides. If length of each side is 4 cm, then what is the area (in cm2) of an equilateral triangle with side equal to the bigger diagonal of the rhombus?

If x=aCosθCosΦ, y = aCosθSinΦ and z= aSinθ, then the value of x2+ y2 + z2 is

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

What is the third proportional to 10 and 25?